The author of the popular Sibley Guide to Birds and other books explains bird behaviors and field marks, birding techniques, and more.
Many songbird species have wingbars — one or more rows of markings across a bird’s folded wing. Northern Parula has two white wingbars that are about equal in size. Art by David Sibley
Why the appearance of first-year birds in the same species can differ significantly. Read More “David Sibley explains variability in songbirds”
David Sibley provides tips for sorting out House Sparrows from New World Sparrow species. Read More “Distinguishing House Sparrow will help you identify other sparrows”
To understand birds better, take a closer look at feathers. Read More “How the sizes of birds’ various feathers influence color patterns”
David Sibley warns of the tricks light can play on birders when it comes to identification. Read More “Why lighting conditions can throw birders a curveball”
How feathers react after a drenching can affect our perceptions of birds’ appearances. Read More “Identifying birds when their feathers are wet”
Use these tips to identify two of the most prominent groups of streaky brown birds. Read More “Learn to differentiate finches and sparrows”
Understanding how and when feathers on the rump are visible can improve your birding skills. Read More “How to use birds’ rump color as a field mark”
Across much of the world, winter is a season for studying waterbirds, and if you have access to a large body of water (ocean, large … Read More “Birds to look for when winter winds kick up”
What to watch for when birds flash their tails. Read More “Patches in birds’ tail feathers can lead you to ID them”
