Delve deeper into special topics through Interactive Features and in depth articles.

Biology
Bird Academy's A-to-Z Glossary of Bird Terms
Learn to express yourself like an ornithologist with this expanded glossary of terms.   ABC...
article
Spectrogram of a White-throated Sparrow Song
Biology
Avian Vocal Behavior—Sound Visualizations
Throughout this chapter you will find references to songs and calls that will help you understan...
page
Conservation
How Hunters and Artists Helped Save North America’s Waterfowl
Be a part of the Duck Stamp success story.
article
collage of bird photos arranged to create a rainbow gradient
AnatomyFeathers
How Birds Make Colorful Feathers
The colors in the feathers of a bird are formed in two different ways, from either pigments or f...
article
Feathers
Bird Plumage Variations and Abnormalities
Variations in plumage can be based on the sex of the bird, its age, or seasonal changes caused b...
article
Bird IDSongs + Calls
Behind the Scenes of Birds Got Swing
Last April, just as the birds were flowing into Central Park on their spring migration, I had th...
article
Songs + Calls
How and Why Birds Sing
birds!
article
Songs + Calls
Anatomy of Bird Song Slides
See the songbird syrinx in action and animate one of the most complex trills in the bird world w...
download
Songs + Calls
Bird Song Visualized Slides
Learn to “see” and better understand bird song with the Bird Song Visualized Slide C...
download
Feathers
Feather Biology Slide Collection
From animated views of feather microstructure to step-by-step diagrams of the feather growth pro...
download
Detail of blue feathers
Feathers
Everything You Need To Know About Feathers
Unique to birds and their dinosaur ancestors, feathers have evolved into impressive biological s...