Black-Crowned Night Heron in Shanghai: ID Guide
Spot a black-crowned night heron in Shanghai? Learn how to identify adults, juveniles, and look-alikes, plus the best local sites to find them.
Birding Tips
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Field guides, identification tips, and everything for better birding.
How Much Do Snowy Owl Wings Weigh? Size & Flight Facts
Wondering how much snowy owl wings weigh? Learn estimated wing weight, wingspan, wing loading, and how these stats power one of North America's heaviest owls.
Birding Tips
Can You Identify a Bird or Other Creature? Full Guide
Not sure what bird or creature you just spotted? Use our expert field guide to identify any North American bird or wildlife by size, shape, bill, and behavior.
Bird Identification
How to ID a Bird Carcass: Field Marks & Techniques
Found a dead bird and want to know the species? Learn how to identify a bird carcass using feathers, bill shape, feet, size, and habitat clues.
Birding Tips
Can Ospreys Eat Pufferfish Without Being Poisoned?
Do ospreys get poisoned by pufferfish tetrodotoxin? Explore the science of raptor toxicology, osprey diet, and why this fish-eating hawk is likely unharmed.
Birding Tips
Mystery Bird Sounds: What Bird Is Making That Noise?
Heard an unidentified bird sound? This guide identifies the most common mystery bird sounds in North America by pitch, pattern, and habitat — with expert tips and apps.
Birding Tips
Common Birds in San Jose, California: ID Guide
Spot a mystery bird in San Jose, CA? Identify the 12 most common species — from Anna's Hummingbird to Great Blue Heron — with field marks, habitats, and tips.
Birding Tips
What Are These Migrating Birds? ID Guide for Beginners
Wondering what migrating birds you're seeing? Identify warblers, sparrows, thrushes, shorebirds & raptors with this expert field guide for all skill levels.
Birding Tips
Owl Sounds Explained: How to Identify Common Owl Calls
Heard a mysterious bird sound at night? Learn how to identify owl calls — Great Horned, Barred, Screech-Owl, Saw-whet — plus non-owl sounds often mistaken for owls.
Birding Tips
How to Tell a Bird's Age: Field Guide to Aging Birds
Learn how to tell a bird's age using plumage, eye color, bill color, molt patterns, and behavior. Expert tips for aging common North American birds.
Birding Tips