There are a total of 1,540 Birds that have been compiled and organized in this comprehensive list. The selection includes widely recognized common names, confirmed scientific names, widespread species and well-documented regional endemics.

Birds are warm-blooded vertebrates with feathers, beaks, and lightweight skeletons adapted for flight or other lifestyles. They range from tiny hummingbirds to large flightless species like ostriches. They occupy habitats worldwide, from forests and wetlands to cities and coasts. Birds serve roles in ecosystems, culture, and science, from pollination to ecological monitoring.

Interesting and little-known facts about Birds:
– There are about 10,800 bird species worldwide, depending on the taxonomy used.
– About 13% of bird species are listed as threatened on the IUCN Red List.
– The wandering albatross has the largest wingspan, reaching roughly 350 cm.
– The bee hummingbird is the smallest bird, about 5–6 cm long and 1.6–2 g in weight.
– The Arctic tern migrates roughly 70,000 km round trip each year between poles.
– A Laysan albatross named Wisdom is recorded breeding at over 70 years of age.

The alphabetical index directs readers to A–Z lists of Birds by common English name. Each letter’s list shows: common name; scientific name (binomial); habitat category; typical wingspan (cm); primary distribution; conservation status.