Image of a flock of red knots

A flock of red knot • Photo by Don Faulkner (CC BY-SA 2.0)

A red-winged blackbird singing while perched on a cattail

Red-winged blackbird • Photo © Tom Raymo

Image of a great blue heron in flight

A great blue heron in flight • Photo by Tom Raymo (© 2021)

Image of a long-billed bird with a distinctive crown of feathers

A hoopoe • Photo by Hans Veth on Unsplash

Image of four speckled eggs in a nest on the ground

The nest of a kildeer • Photo by David Moulton (CC BY 2.0)

Image of Tenniel's dodo illustration with modern reconstruction

John Tenniel's classic illustration of Alice and the Dodo, along with a modern reconstruction • Photo by BazzaDaRambler (CC BY 2.0)

Image of two tree swallows flying near a nesting box

Photo by Jongsun Lee on Unsplash

Image of large cuckoo chick being fed by smaller bird

Rufous Fantail feeding Brush Cuckoo • Photo by Damien.cook.frog (CC BY-SA 4.0)

Painting of great auk

Great auk • John James Audubon

Image of Eastern Bluebird

Eastern Bluebird • Andy Reago & Chrissy McClarren (CC BY 2.0)