The field guide illustrator David Sibley gave instructions for drawing a bird.
Learn to Draw Birds with David Sibley
What It's Like to Be a Bird: A Review of the New Sibley Book - 10,000 Birds
David Sibley's Instagram, Twitter & Facebook on IDCrawl
How to Draw a Bird - The New York Times
How Sketching Birds Changes the Way You See Them - The New York Times
Buy The Sibley Field Guide to Birds of Western North America Online With Canadian Pricing - Urban Nature Store
Cómo dibujar aves, según David Sibley - The New York Times, Dibujar
David Sibley's Instagram, Twitter & Facebook on IDCrawl
Opinion 7 Tips for Watching Birds During the Spring Lockdown - The New York Times