About BirdWise

What is BirdWise?

BirdWise is a web-based application brought to you by the Bird Academy team at the Cornell Lab of Ornithology designed to help you practice your bird identification skills. The tool is all about building your bird ID confidence in a customizable, fun online platform. The initial release includes visual identification training for the 640 bird species common across the continental United States and Canada, with plans to incorporate sound identification training and expand to more regions.

Video Clip: What is BirdWise?

Why We Created BirdWise

The Bird Academy team at the Cornell Lab of Ornithology developed BirdWise quizzing in response to enthusiasm from our audience for a tool that lets you practice bird identification outside of the field.

BirdWise evolved from the SnapID tool we developed for Bird Academy courses which randomly displays two photos and asks you to choose your focal species. We then guide you through iterations of this either-or activity using a variety of photos from different angles and lighting conditions until you have built your confidence. This learning framework allows you to practice in a low-stakes environment and build up a gestalt feel for how your focal species look under a variety of field conditions from wherever you feel like practicing.

Our goal is to cultivate a rich learning experience capable of meeting users at their current skill level and create a dynamic quizzing engine that:

• acknowledges the regional diversity of bird species
• provides tailored quizzes based on user location, and
• progressively increases question difficulty as your proficiency advances.

Who BirdWise is For

BirdWise is a great tool for people of all levels who want to learn to ID birds. Many of our users love the Merlin app and want to take the next step in their learning so that they can ID birds independently. Others are more seasoned birders who want to practice species in a new region because they are traveling. No matter what your identification skills are, we all have birds that we need practice on. BirdWise is the flexible, customizable tool to help you achieve your goals.

Video Clip: BirdWise Play Along

How BirdWise Works

BirdWise leverages vast amounts of crowd-sourced data and media from the Cornell Lab's Macaulay Library and eBird to provide accessible, structured learning pathways from wherever you choose to get started. Macaulay Library , is a multimedia library of user-submitted images, sounds, and videos with over 80 million contributions to date and eBird is a long-running global database of more than 2 billion bird observations shared by birders and participatory scientists from across the globe.

Through eBird data, we determine which birds a user is likely to encounter at their location as well as the probability of observing them. To deliver questions that progress in difficulty as you learn, we devised an algorithm to generate functionally unique questions with a ranked difficulty.

Types of difficulty we included in the algorithm

Species Rarity

BirdWise shows you quizzes with common birds to start, and increases the frequency of rarer species as you go. This way you are learning the birds you are most likely to see before those that only show up rarely or live in very restricted habitats.

Species Similarity

Bird identification difficulty varies substantially across species based on how similar any two species appear. We asked our birder colleagues here at the Lab to help us build a dataset of how visually similar each species is to one another. The resulting similarity matrix allows us to quiz you on species that look more and more similar to one another as you progress.

Question Format

A further dimension of question difficulty is the question format itself. As you progress we introduce harder question types from easiest to hardest: true/false, two-option ID, three-option ID, and finally name retrieval. The hardest questions give you the least context and ask you to generate answers yourself rather than choose from a pre-made list.

FAQs

Can I use BirdWise to ID the birds near me?

BirdWise helps you set your learning goals so that you can focus on the birds that you'll find in your region. Beyond your region, you can also use BirdWise to learn the birds in a specific habitat. For example, if you want to learn birds in New York State that can be found in wooded areas, birds you can find in California near the water, or Texas birds you can find in grasslands or open spaces, you can easily set BirdWise to only those species. It's a great way to get up-to-speed quickly on bird ID.

Can I use BirdWise to learn a specific group of birds?

BirdWise lets you customize your quizzing so that you are focused on a group of birds you are interested in—like waterfowl, owls, raptors, or warblers. Once you have completed one group, you can flexibly move on to another group at your own pace and based on the order you want to learn the bird groups or families in. You can also set BirdWise to only quiz you on a specific region or habitat. You can change and customize your settings as often or as little as you want depending on your learning goals.

Can I use BirdWise to help me learn difficult bird IDs? Can I make my own quizzes based on the species that are hard for me?

BirdWise is designed to help you learn those birds that are particularly difficult for you. Your so-called "nemesis" birds can be those that are tricky to tell apart visually, hard to see in the field, or just rare enough that you don't get to experience them much. In BirdWise you can build a custom species list and only quiz on the species that you have the most difficulty with. It's a great way to work through the species that most challenge you and build your confidence for the field.

Can I use BirdWise to prepare for birding while traveling?

BirdWise is a great tool for your upcoming birding trip. Whether you're embarking on your first birding adventure, targeting species for your life list, or even embarking on a Big Year, BirdWise helps you customize your learning goals so that you are only asked questions that are relevant to the region and habitat that you are traveling to. When you arrive at your destination you will be primed to identify all those birds you might not have encountered before.

How is BirdWise different from Merlin and eBird?

BirdWise, Merlin, and eBird are all platforms from the Cornell Lab of Ornithology that help you with your birding and bird appreciation. While Merlin is designed for in-the-moment identification and eBird is for logging observations, BirdWise functions as a dedicated practice and training platform. Our surveys have taught us that users value BirdWise as an "addictive" and "fun way to be quizzed", leveraging its "short quizzes" for focused learning sessions that are distinct from field activities.

Does BirdWise feel like a game? Is BirdWise a game?

BirdWise is being continuously developed as a learning tool with elements of your favorite apps and games to help keep you having fun and feeling motivated. We show your overall stats along with daily and weekly streaks. For each challenge you set yourself, we step you up through three skill levels as you progress through the quizzes. Once you have completed level three, we celebrate your achievement with a big check mark and move you to the next challenge.

Will I ever get the same quiz question twice?

Each time BirdWise builds you a new quiz, it is pulling from a large set of media and applying an algorithm that starts you out easy and steps you up through more difficult IDs as you go. Each quiz is built on the fly and so while you might see the same image twice, it's very unlikely that you'll get the same question twice. You'll be introduced to birds from all different angles and lighting conditions so you are experiencing the remarkable natural variation that you'll find in the field.

Can I use BirdWise on my smart phone or mobile phone?

BirdWise works well on mobile devices of all kinds through a web browser. In the future, we may offer a mobile app that you'll be able to access through the app stores on your phone. Either way our team has designed the learning tool so that it's accessible and easy to use on your phone.

Why don't you train me on the birds before I get quizzed?

The BirdWise learning framework is based on the concept that fun, low-stakes practice is what makes perfect. We guide you to jump right in to the easiest quizzes and build up your confidence through playful practice. For when you feel stuck or want more context on the birds in your quiz, we provide an ID Tips section accessible at all times which will jump-start your skills and get you back to practicing.

Why are species outside my region showing up in my quizzes?

In quizzes that are regionally specific, we have chosen to include "distractor" species from outside the region for two reasons. First, we believe it exposes you to a wider slice of bird diversity and helps you practice honing in on the most useful field marks of your focal species. In addition, often enough, there aren't enough look-alike species in a given region to be able to build a functional quiz without including species from other regions.

Can I quiz based on bird sounds?

Thanks to the enthusiasm of all of you ear-birders out there, we're working on adding sound quizzing to BirdWise. In Fall 2025 the Bird Academy team initiated a project to build sound quizzes into the BirdWise software. It's one of our most requested features so stay tuned!

Acknowledgements

BirdWise is brought to you by the Bird Academy Team at the Cornell Lab of Ornithology made up of software engineers, ornithologists, instructional designers, and media experts dedicated to helping you learn.

Lead Software Architect and Project Manager: Jeff Szuc
Lead Software Engineer: Frances Steen
eCommerce Developer: Josh Pelrine
Lead Ornithologist and Content Manager: Samantha Hauser, PhD
Scientific Reviewers: Kevin McGowan, PhD, Matt Medler, Jill Leichter, Marla Coppolino
Executive Producer: Mya Thompson, PhD

Special thanks to the Cornell Lab staff who helped build our similarity matrix and provided other support. And a special thank you to the vibrant birding community contributing to eBird and the Macaulay Library!

All About Birds

Similar species data and species descriptions provided by All About Birds .

eBird

Species observation frequency data powered by eBird .

Macaulay Library

Photos provided by Macaulay Library .

Photo Credits:

Special thanks to all photographers who have contributed photos to Macaulay Library. Quiz photos are credited within the quizzes in which they appear. Thumbnail photos used for species, families, and regions are credited as follows:

Broad-billed Hummingbird: Ryan Sanderson, Dusky-capped Flycatcher: Andrew Newmark, Common Gallinule: Louis Hoeniger, Willet: Evan Lipton, Philadelphia Vireo: Mark Morse, Blue-winged Warbler: Daniel Irons, Red-footed Booby: Francis Canto Jr, Calliope Hummingbird: Marya Moosman, Least Bittern: Myles McNally, Short-billed Gull: Andrew Spencer, Bullock's Oriole: Nancy Christensen, Allen's Hummingbird: Dean LaTray, Brown Thrasher: Martina Nordstrand, Purple Finch: Henry Trombley, Common Eider: Kojo Baidoo, Eared Grebe: Caroline Lambert, Boat-tailed Grackle: Marie Hosch, White-tailed Ptarmigan: Forest Botial-Jarvis, Pine Warbler: Ryan Schain, Scissor-tailed Flycatcher: Ryan Shaw, Eurasian Wigeon: Christoph Moning, Lucifer Hummingbird: Marky Mutchler, Rose-breasted Grosbeak: Tom Snow, Ring-billed Gull: Cameron Eckert, Scarlet Tanager: Ryan Sanderson, Chestnut-backed Chickadee: John Reynolds, Greater Pewee: Holger Teichmann, Little Blue Heron: Etienne Artigau, Emperor Goose: Sergius Hannan, Hudsonian Godwit: Andy Bankert, Yellow Warbler: Brad Imhoff, Long-billed Curlew: Ian Davies, Sandhill Crane: Lorri Howski , Aplomado Falcon: Tom Johnson, Canada Jay: Vitalii Khustochka, Peregrine Falcon: Joshua Stacy, Common Raven: Christopher Lindsey, Blue-footed Booby: Darren Clark, LeConte's Thrasher: Andrew Spencer, Surfbird: Tom Edell, Common Tern: Michiel Oversteegen, Eurasian Collared-Dove: Jim Merritt, Dickcissel: Martina Nordstrand, Townsend's Warbler: Matt Brady, White-crowned Sparrow: Michel Bourque, Kentucky Warbler: Brad Imhoff, Black-capped Vireo: Bryan Calk, Black Turnstone: Nick Athanas, Northern Pygmy-Owl: Blair Dudeck, Red-faced Cormorant: Phillip Edwards, Great Cormorant: Evan Lipton, Blue-headed Vireo: Ronnie d'Entremont, Northern Rough-winged Swallow: Ryan Schain, Semipalmated Sandpiper: Tyler Ficker, Chipping Sparrow: Evan Lipton, Common Goldeneye: Dorian Anderson, Gray-crowned Rosy-Finch: Russ Morgan, Painted Redstart: Bryan Calk, Song Sparrow: Jonathan Irons, Say's Phoebe: Daniel Irons, Loggerhead Shrike: Dorian Anderson, Montezuma Quail: Susan Wrisley, Green Jay: Scott Martin, Snowy Egret: Evan Lipton, Grace's Warbler: Carlos Echeverría, Northern Gannet: John Reynolds, Black-capped Chickadee: Scott Martin, Pomarine Jaeger: Ian Davies, Olive Sparrow: Suzie McCann, Purple Sandpiper: Ryan Schain, Yellow-throated Vireo: Todd Fellenbaum, Clark's Nutcracker: David Hollie, Brandt's Cormorant: Matt Davis, Northern Waterthrush: Fernando Burgalin Sequeria, White-rumped Sandpiper: Jay McGowan, Wandering Tattler: Matt Davis, Prothonotary Warbler: Ryan Sanderson, Rock Sandpiper: Mason Maron, Common Grackle: Jack & Holly Bartholmai, Nashville Warbler: Gracie McMahon, Franklin's Gull: Joe Bailey, California Condor: Brian Sullivan, Clapper Rail: Joe Girgente, Hermit Warbler: Ian Davies, Wilson's Storm-Petrel: Peter Flood, Western Meadowlark: Alix d'Entremont, Greater Roadrunner: Lawrence Haller, Hepatic Tanager: Nate Gowan, Redhead: Bryan Calk, Lesser Yellowlegs: Caleb Putnam, Northern Mockingbird: Jay McGowan, Rhinoceros Auklet: Eric Ellingson, Wood Duck: Ryan Schain, Caspian Tern: Sasha Cahill, Vesper Sparrow: Simon Boivin, Cinnamon Teal: Ad Konings, American Goldfinch: Darren Clark, Cassin's Kingbird: Roger Clark, Laysan Albatross: Russ Morgan, Warbling Vireo: Don Danko, Sooty Shearwater: Darren Clark, Acadian Flycatcher: Dan Jones, Sagebrush Sparrow: Marky Mutchler, Northern Saw-whet Owl: Ana Paula Oxom, Red-breasted Sapsucker: Grace Oliver, California Towhee: Matt Davis, Anna's Hummingbird: Kyle Blaney, Blue-gray Gnatcatcher: Kojo Baidoo, MacGillivray's Warbler: John Gordon, Common Pauraque: Claudia Brasileiro, Cassin's Auklet: Yousif Attia, Yellow-headed Blackbird: Dorian Anderson, Arizona Woodpecker: Daniel Irons, Virginia Rail: Evan Lipton, Ivory Gull: Brian Sullivan, Sooty Grouse: Blair Dudeck, Williamson's Sapsucker: Sharif Uddin, American Oystercatcher: Dorian Anderson, Bay-breasted Warbler: Keenan Yakola, Palm Warbler: Keenan Yakola, Louisiana Waterthrush: Julian Gottfried, African Collared-Dove: Andrés Rojas Sánchez, American Wigeon: Karl Krueger, California Gull: Daniel Arndt, Bank Swallow: Darlene Friedman, Black-chinned Hummingbird: Mike Stewart, Canada Goose: Max McCarthy, Pectoral Sandpiper: Ian Davies, Killdeer: Brad Imhoff, American White Pelican: Gerrit Vyn, Scaled Quail: Ad Konings, Wilson's Warbler: Brad Imhoff, Bufflehead: Liron Gertsman, Bald Eagle: Mason Maron, Black Swift: Michael Bolte, Red-breasted Nuthatch: Blair Dudeck, Zone-tailed Hawk: Alison Davies, Mountain Chickadee: Michael Woodruff, Phainopepla: Sharif Uddin, Tufted Titmouse: Darlene Friedman, Chihuahuan Meadowlark: Bradley Hacker , Snow Goose: Brad Imhoff, Bendire's Thrasher: Andrew Spencer, Spotted Towhee: Mason Maron, Arctic Warbler: Seth Beaudreault, Elf Owl: Bryan Calk, Swamp Sparrow: Ryan Schain, Cooper's Hawk: Evan Lipton, Yellow Rail: Andrew Spencer, Brown-headed Nuthatch: Kojo Baidoo, Trumpeter Swan: Ian Davies, Mourning Dove: Ryan Schain, Little Gull: Cameron Eckert, Blackpoll Warbler: Simon Boivin, American Barn Owl: Sharif Uddin, Common Loon: Christian Hagenlocher, Connecticut Warbler: Ryan Sanderson, Mangrove Cuckoo: Aaron Juan, Horned Puffin: Sam Woods/Tropical Birding Tours, Mexican Jay: Mauricio López, Varied Thrush: Graham Gerdeman, Lesser Prairie-Chicken: Alex Eberts, Verdin: Bryan Calk, Elegant Tern: Brian Sullivan, Sabine's Gull: Daniel López-Velasco | Ornis Birding Expeditions, Black Phoebe: Brian Sullivan, Blue Grosbeak: Cliff Peterson, Pyrrhuloxia: Suzie McCann, Mountain Bluebird: Darren Clark, Black-throated Sparrow: Luke Seitz, Surf Scoter: Matt Davis, Red-naped Sapsucker: Joshua Covill, Bluethroat: Bryan Calk, Gila Woodpecker: Thomas Anderson, Green Kingfisher: Pablo Re, Virginia's Warbler: Timo Mitzen, Red-faced Warbler: Marky Mutchler, White-crowned Pigeon: Daniel Irons, White-tailed Kite: Matt Davis, American Avocet: Ian Davies, Golden-cheeked Warbler: Bryan Calk, Pacific Golden-Plover: Sharif Uddin, Fork-tailed Storm-Petrel: Ken Chamberlain, Least Tern: Sam Miller, Thick-billed Longspur: Bryan Calk, Barred Owl: Blair Dudeck, Marsh Wren: Jay McGowan, Burrowing Owl: Christopher Lindsey, Turkey Vulture: Matt Davis, Northern Wheatear: Lukasz Pulawski, Gray Hawk: Patrick Maurice, Swallow-tailed Kite: Adam Wilson, Golden-crowned Sparrow: David M. Bell, Black-whiskered Vireo: Michiel Oversteegen, American Herring Gull: Simon Boivin, Barn Swallow: Mason Maron, Black Skimmer: Dorian Anderson, LeConte's Sparrow: Brian Sullivan, Steller's Eider: Marco Valentini, Golden-fronted Woodpecker: Darren Clark, Costa's Hummingbird: Gordon Karre, Clay-colored Sparrow: Chris Wood, White-winged Crossbill: Bryan Calk, House Sparrow: Evan Lipton, Northern Hawk Owl: Blair Dudeck, Tufted Duck: Honza Grünwald, Sprague's Pipit: Bradley Hacker , Canyon Wren: Bryan Calk, Gray Kingbird: Peter Trimble, American Tree Sparrow: Dorian Anderson, Abert's Towhee: Jason Vassallo, Snowy Plover: Sharif Uddin, Northern Cardinal: Suzie McCann, Black Guillemot: Holly Merker, Parasitic Jaeger: Eric Gofreed, Flammulated Owl: Brandon K Percival, Magnificent Frigatebird: Marky Mutchler, Green Heron: Brad Imhoff, Cactus Wren: Moe Bertrand, Great-tailed Grackle: Darren Clark, Pinyon Jay: Andrew Spencer, Savannah Sparrow: Bryan Calk, Ruby-crowned Kinglet: Evan Lipton, White-headed Woodpecker: Paul Maury, Yellow-bellied Sapsucker: Monique Maynard, Red Knot: Ian Davies, Prairie Falcon: Brian Sullivan, Ferruginous Pygmy-Owl: Fernando Burgalin Sequeria, Great Kiskadee: Luke Seitz, Spruce Grouse: Kevin Pero, Neotropic Cormorant: Darren Clark, Common Murre: Alix d'Entremont, Evening Grosbeak: bellemare celine, Baird's Sparrow: Brian Sullivan, Reddish Egret: Fyn Kynd, Western Kingbird: Gerrit Vyn, Double-crested Cormorant: Anonymous, Great Black-backed Gull: Ryan Schain, Violet-crowned Hummingbird: RJ Baltierra, Chestnut-sided Warbler: Keenan Yakola, Black-billed Magpie: Kathryn Keith, Hutton's Vireo: Jerry Ting, Lesser Scaup: Brian Sullivan, Plain Chachalaca: Ian Davies, Whooping Crane: Tom Johnson, Bell's Sparrow: Ronnie Reed, Merlin: Brian Sullivan, Red-shouldered Hawk: Bob MacDonnell, Swainson's Warbler: Aidan Rominger, Blue Jay: Scott Martin, Spot-breasted Oriole: Fernando Burgalin Sequeria, American Kestrel: Michael JD, Nelson's Sparrow: Luke Seitz, Rock Wren: Danny Tipton, Chimney Swift: Peter F, Sora: Ryan Yann, Ruby-throated Hummingbird: Brian Kulvete, Cedar Waxwing: Malcolm Gold, Inca Dove: Graham Montgomery, Northern Harrier: Tom Reed, Tundra Swan: Ian Davies, Graylag Goose: Christoph Moning, Band-tailed Pigeon: Paul Fenwick, Willow Ptarmigan: Andy Bankert, Snail Kite: Ian Routley, Belted Kingfisher: Charlie Bruggemann, Chukar: Ian Routley, Lesser Black-backed Gull: Terry Bohling, Western Wood-Pewee: Brian Peterson, Yellow-crowned Night Heron: Evan Lipton, Greater White-fronted Goose: Ryan Schain, Bobolink: Ryan Sanderson, Marbled Godwit: Jeff Timmons, Northern Beardless-Tyrannulet: Tanner Martin, Snowy Owl: Ian Davies, Atlantic Puffin: Simon Boivin, Black Vulture: Luke Seitz, Great Blue Heron: Daniel Grossi, Saltmarsh Sparrow: Evan Lipton, Cave Swallow: Brett Hoffman, Pacific Loon: Tyler Ficker, Tricolored Heron: Dorian Anderson, Gilded Flicker: Bradley Hacker , Wood Thrush: Fernando Burgalin Sequeria, Piping Plover: Forest Botial-Jarvis, Sharp-tailed Grouse: Sulli Gibson, Buff-bellied Hummingbird: Ian Davies, Osprey: Kris Perlberg, Rusty Blackbird: Daniel Jauvin, Yellow-bellied Flycatcher: Jeremiah Trimble, Broad-tailed Hummingbird: Tristan Herwood, Olive-sided Flycatcher: Luke Seitz, Eastern Whip-poor-will: Josh Davidson, American Golden-Plover: Ian K Barker, Red-bellied Woodpecker: Carl Giometti , Golden-winged Warbler: Luke Seitz, Pelagic Cormorant: Jesse Amesbury, Roseate Spoonbill: Peter Hawrylyshyn, Mottled Duck: Melissa James, Smith's Longspur: Andrew Spencer, Vaux's Swift: Joachim Bertrands | Ornis Birding Expeditions, Black-backed Woodpecker: Luke Berg, Northern Flicker: Warren Lynn, Ancient Murrelet: Hal and Kirsten Snyder, Canyon Towhee: Jeffrey Moore, Sanderling: Jonathan Lugo, Swainson's Hawk: Steven Mlodinow, Ring-necked Duck: Dorian Anderson, Ferruginous Hawk: Ian Davies, Pigeon Guillemot: Matt Davis, Cackling Goose: Matt Brady, Eastern Kingbird: Frank Lehman, Greater Yellowlegs: Jay McGowan, Smooth-billed Ani: Paul Tavares, Heermann's Gull: Andrew Spencer, White-throated Sparrow: Keenan Yakola, Rufous-crowned Sparrow: Jay McGowan, Lapland Longspur: Ian Davies, Spotted Owl: Caleb Strand, Iceland Gull: Amanda Guercio, Black-headed Grosbeak: Bridget Spencer, Brown-crested Flycatcher: Scott Holt, Bell's Vireo: Don Danko, American Coot: Daniel Irons, Brant: Evan Lipton, Ring-necked Pheasant: Matt Davis, Eastern Wood-Pewee: John Deitsch, Common Poorwill: Jacob Drucker, Audubon's Oriole: Carol Henrichs, Boreal Owl: Christoph Moning, Red-tailed Hawk: Jonathan Eckerson, Red-necked Grebe: Richard Poort, Fox Sparrow: Evan Lipton, Northern House Wren: Andy Witchger, Swainson's Thrush: terence zahner, American Goshawk: Robert Post, Winter Wren: Brad Imhoff, Tennessee Warbler: Chris S. Wood, Glaucous-winged Gull: Timo Mitzen, Marbled Murrelet: Joachim Bertrands | Ornis Birding Expeditions, Rock Ptarmigan: Caleb Putnam, Elegant Trogon: Bryan Calk, Ross's Goose: Marshall Iliff, Carolina Chickadee: Martina Nordstrand, Cerulean Warbler: Pam Linge, Yellow-breasted Chat: Kent Jensen, American Crow: Henry Burton, Pine Siskin: Jonathan Irons, Gray Vireo: Ian Davies, Pine Grosbeak: Christoph Moning, Northern Parula: Ryan Schain, Ladder-backed Woodpecker: Edward Plumer, Lesser Goldfinch: Sharif Uddin, Western Flycatcher: Liam Singh, Dunlin: Dorian Anderson, Whimbrel: Sharif Uddin, Mallard: Christoph Moning, Glaucous Gull: Marco Valentini, Red-cockaded Woodpecker: Shailesh Pinto, Blackburnian Warbler: Ezra Staengl, Lucy's Warbler: pierre martin, Wilson's Phalarope: County Lister Brendan, Painted Bunting: David Hollie, Monk Parakeet: Kacau Oliveira, Black Rail: Héctor Bottai, Gambel's Quail: Jason Vassallo, Laughing Gull: Dorian Anderson, Semipalmated Plover: Darren Clark, Long-billed Thrasher: Darren Clark, Cliff Swallow: Caleb Putnam, Tufted Puffin: Benjamin Van Doren, Northern Shoveler: Dorian Anderson, Roseate Tern: Alix d'Entremont, Black Scoter: Doug Hitchcox, Mountain Plover: Stephan Lorenz I Rockjumper Birding Tours, Bridled Titmouse: Ian Davies, California Quail: Nancy Christensen, Cassin's Vireo: Michael Stubblefield, Golden Eagle: Bryan Calk, Hooded Oriole: Jerry Ting, Bonaparte's Gull: Jim Sims, Red-crowned Amazon: Madeleine Sandefur, California Scrub-Jay: Ilya Povalyaev, Black-crested Titmouse: Bryan Calk, Hammond's Flycatcher: mark daly, Eurasian Tree Sparrow: Ivan Sjögren, Worm-eating Warbler: Graham Gerdeman, White-faced Ibis: Michael Brown, Field Sparrow: Ryan Sanderson, Hooded Warbler: Evan Lipton, Stilt Sandpiper: James Corgill, Lark Bunting: David de Rivera Tønnessen, Cassin's Finch: Milton Vine, Gray Catbird: Evan Lipton, Rivoli's Hummingbird: Jason Vassallo, Black-footed Albatross: Jonathan Eckerson, Hermit Thrush: August Davidson-Onsgard, Spotted Sandpiper: Ian Hearn, Golden-crowned Kinglet: Ryan Schain, Black-tailed Gnatcatcher: Sharif Uddin, Prairie Warbler: Luke Seitz, Dusky Flycatcher: Garrett Lau, Lawrence's Goldfinch: Will Knowlton, Red-winged Blackbird: Connor Charchuk, Buff-breasted Flycatcher: Cameron Rutt, Yellow-rumped Warbler: Ezra Staengl, Black Tern: Ian K Barker, Shiny Cowbird: Brian Sullivan, Common Yellowthroat: Ryan Sanderson, Gull-billed Tern: Jesse Amesbury, Gray Flycatcher: Darren Clark, Roadside Hawk: Bradley Hacker , Yellow-billed Magpie: Brian Sullivan, American Pipit: Mason Maron, Black-bellied Whistling-Duck: Shawn Billerman, Ridgway's Rail: Dean LaTray, Western Sandpiper: Dorian Anderson, Gadwall: Daniel Pettersson, Brewer's Blackbird: Jonathan Eckerson, Mountain Quail: Steve Rottenborn, Ash-throated Flycatcher: Bryan Calk, Harris's Hawk: Nate Gowan, Florida Scrub-Jay: Cassidy Ficker, Great Crested Flycatcher: Jack & Holly Bartholmai, Red-necked Phalarope: Dorian Anderson, Mourning Warbler: André Lanouette, Sedge Wren: Brad Imhoff, Ruffed Grouse: Alix d'Entremont, Broad-winged Hawk: David Brown, Red-breasted Merganser: Daniel Grossi, Woodhouse's Scrub-Jay: Curtis McCamy, Gray Partridge: Holger Teichmann, Olive Warbler: Bryan Calk, Rufous Hummingbird: Spencer Follett, Pygmy Nuthatch: Bryan Calk, Rough-legged Hawk: Bryce Robinson, Bronzed Cowbird: Brian Sullivan, Horned Lark: Christoph Moning, Violet-green Swallow: Joshua Covill, Cape May Warbler: Keenan Yakola, Royal Tern: Christoph Moning, White-breasted Nuthatch: Ryan Schain, White-winged Dove: Jeff Timmons, Buff-breasted Sandpiper: Ian Davies, Western Tanager: Simon Boivin, Common Ground Dove: Volker Hesse, Pink-footed Goose: Shawn Billerman, Razorbill: Ondřej Beneš, Greater Scaup: Frank King, Great Egret: Alex Lamoreaux, Black-headed Gull: Lukasz Pulawski, Least Sandpiper: Simon Boivin, Vermilion Flycatcher: Bradley Hacker , Wilson's Plover: Melissa James, Bewick's Wren: Michael Stubblefield, Forster's Tern: Jonathan Irons, Ruddy Turnstone: Jay McGowan, American Robin: Alex Eberts, Rock Pigeon: Luke Seitz, Bohemian Waxwing: Daniel Jauvin, Parakeet Auklet: Marco Valentini, Solitary Sandpiper: Brad Imhoff, Black-throated Green Warbler: Ronnie d'Entremont, Brewer's Sparrow: David Hollie, Muscovy Duck: Marco Valentini, Mississippi Kite: Don Danko, White-throated Swift: Jonathan Eckerson, Cassia Crossbill: Zak Pohlen, Dusky Grouse: Andrew Spencer, Carolina Wren: Don Danko, Blue-winged Teal: Dave Spier, Short-eared Owl: Tim Lenz, Townsend's Solitaire: Ryan O'Donnell, Veery: Drew Weber, Eastern Meadowlark: Doris Brookens, Purple Martin: Reanna Thomas, Black-throated Gray Warbler: mark daly, Snow Bunting: Christoph Moning, Brown-capped Rosy-Finch: Jacob Drucker, Ruddy Duck: pierre martin, Purple Gallinule: Geoff Hill, White-tailed Hawk: Justin Bosler, Wild Turkey: Petra DeBruine, Redpoll: Mollie Ficker, American Bittern: Jason Dain, Chuck-will's-widow: Kathy Doddridge, Crissal Thrasher: Adam Dudley, Hairy Woodpecker: Matthew Plante, Kirtland's Warbler: Bryan Calk, Wilson's Snipe: Bryan Calk, Ovenbird: Ryan Schain, Northern Fulmar: Stephen Mirick, Ringed Kingfisher: Bert Wessling, Upland Sandpiper: Bradley Hacker , Sharp-shinned Hawk: David McQuade, Seaside Sparrow: Evan Lipton, Spectacled Eider: Marco Valentini, Great Gray Owl: Chris Wood, White-eyed Vireo: Craig Brelsford, Tropical Kingbird: Daniel Irons, Black-billed Cuckoo: Kyle Tansley, Brown-headed Cowbird: Jack & Holly Bartholmai, Gunnison Sage-Grouse: Andrew Spencer, Black-and-white Warbler: Ryan Schain, Varied Bunting: Marky Mutchler, Tree Swallow: Max Nootbaar, Red-eyed Vireo: Ryan Schain, Canvasback: Brian Sullivan, Northern Pintail: Liron Gertsman, Eastern Phoebe: Brad Imhoff, Sandwich Tern: Christoph Moning, Lark Sparrow: Joshua Vandermeulen, Magnolia Warbler: Keenan Yakola, Altamira Oriole: Matt Stenger, Bicknell's Thrush: Darren Clark, Downy Woodpecker: Evan Lipton, Mexican Whip-poor-will: Mauricio López, Yellow-eyed Junco: Heather Pickard, Western Bluebird: Brooke Miller, Common Black Hawk: Bryan Calk, Lincoln's Sparrow: Simon Kiacz, House Finch: Martina Nordstrand, Long-billed Dowitcher: Tyler Ficker, Grasshopper Sparrow: Marky Mutchler, Chestnut-collared Longspur: David M. Bell, Pileated Woodpecker: Thierry Grandmont, Blue-throated Mountain-gem: Graham Gerdeman, Gray-headed Swamphen: Albin Jacob, Yellow-throated Warbler: Ryan Sanderson, Northern Bobwhite: Jeff Maw, Eastern Towhee: Jack & Holly Bartholmai, White Ibis: Melissa James, Red-throated Loon: Tyler Ficker, Thick-billed Murre: Lucas Bobay, Black-crowned Night Heron: Melissa James, Juniper Titmouse: Jack Parlapiano, Brown Creeper: Scott Martin, Brown Booby: Bill Adams, Boreal Chickadee: Iris Kilpatrick, Eastern Bluebird: Keith Kennedy, American Three-toed Woodpecker: Blair Dudeck, Short-tailed Hawk: Dick Murray, Barnacle Goose: Christoph Moning, Black-throated Blue Warbler: Aaron Marshall, Willow Flycatcher: Ryan Schain, Baird's Sandpiper: Sulli Gibson, Indigo Bunting: Daniel Irons, Black-bellied Plover: Matt Davis, Wood Stork: Rio Dante, Barrow's Goldeneye: Blair Dudeck, Hooded Merganser: Allan Bigras, Short-billed Dowitcher: Dorian Anderson, Canada Warbler: Tony Dvorak, Least Flycatcher: Darren Clark, Horned Grebe: Cesar Ponce, Black-chinned Sparrow: James Hully, Red Phalarope: Ian Davies, Western Gull: Jessica Hadley, Lazuli Bunting: Wolfe R, Harris's Sparrow: Ian Davies, Ross's Gull: Zak Pohlen, Arctic Tern: Alix d'Entremont, Black Rosy-Finch: Dorian Anderson, Limpkin: Melissa James, Hook-billed Kite: Marvin Pfeiffer, Baltimore Oriole: Fernando Burgalin Sequeria, Long-tailed Jaeger: Ian Davies, Western Grebe: Matt Davis, King Rail: Daniel Irons, Scott's Oriole: Tony Battiste, Common Merganser: Alix d'Entremont, American Dipper: mark daly, California Thrasher: Luke Seitz, American Woodcock: Louis Brodeur, Crested Caracara: Joshua Vandermeulen, Brown Pelican: Dan Vickers, American Redstart: Evan Lipton, Plumbeous Vireo: William Higgins, Masked Booby: Cameron Rutt, Black-necked Stilt: Melissa James, Groove-billed Ani: Michael McCloy, Long-eared Owl: Steven S. Ross, Mute Swan: Jack Bushong, Black Oystercatcher: Sharif Uddin, Summer Tanager: Alex Burdo, Long-tailed Duck: Kojo Baidoo, Alder Flycatcher: Simon Best, Bananaquit: Marcos Eugênio (Birding Guide), Greater Prairie-Chicken: Ryan Sanderson, Rufous-winged Sparrow: Eric Heisey, Lesser Nighthawk: Marky Mutchler, Pied-billed Grebe: Brad Imhoff, Tricolored Blackbird: Daniel Murphy, White-tipped Dove: Darren Clark, Green-winged Teal: Jeff Stacey, Red-headed Woodpecker: Ryan Sanderson, Lewis's Woodpecker: Ian Routley, Yellow-billed Cuckoo: Sue Barth, Dovekie: Rob Edsall, Great Shearwater: Derek Rogers, Greater Sage-Grouse: Ryan Jones, Steller's Jay: Jeff Maw, California Gnatcatcher: Chezy Yusuf, Gray-cheeked Thrush: Tim Arthur, Nuttall's Woodpecker: Christopher Lindsey, Northern Shrike: Cameron Montgomery, Bushtit: Paul Fenwick, Great Horned Owl: Mary Rumple, Harlequin Duck: Ian Davies, Wrentit: Matt Davis, Curve-billed Thrasher: Scott Martin, Sage Thrasher: Doug Gochfeld, Acorn Woodpecker: Brian Sullivan, American Black Duck: Evan Lipton, Green-tailed Towhee: Ian Davies, Henslow's Sparrow: Jeff Timmons, Clark's Grebe: Darren Clark, Dark-eyed Junco: Scott Martin, Cassin's Sparrow: Marky Mutchler, Common Nighthawk: Ronnie d'Entremont, Oak Titmouse: Sharif Uddin, Western Cattle-Egret: Brandon Nidiffer, Orange-crowned Warbler: Ian Davies, Chihuahuan Raven: Matt Sim, Orchard Oriole: Bryan Calk, Least Grebe: Benny Diaz, Fish Crow: Nathan Dubrow, Fulvous Whistling-Duck: Herb Elliott, Bachman's Sparrow: Howard West, Eastern Screech-Owl: dean anderson, European Starling: Matt Davis, King Eider: Ian Davies, Anhinga: Peter Kaestner, Black-legged Kittiwake: Christoph Moning, Couch's Kingbird: Greg Lasley, Red Crossbill: Michael Stubblefield, Glossy Ibis: Jeremiah Trimble, Botteri's Sparrow: Carlos Echeverría, Gyrfalcon: Larry Bowdre, Pacific Wren: Marceline VandeWater, Western Screech-Owl: Tim Avery, White-winged Scoter: Bob MacDonnell