The first classification of birds was developed by Francis Willughby and John Ray in their 1676 volume Ornithologiae. Carl Linnaeus modified that work in 1758 to devise the taxonomic classification system currently in … See more

Compared with other vertebrates, birds have a body plan that shows many unusual adaptations, mostly to facilitate flight.
Skeletal system
The skeleton consists of very lightweight bones. They have … See more

Birds occupy a wide range of ecological positions. While some birds are generalists, others are highly specialised in their habitat or … See more

Human activities have caused population decreases or extinction in many bird species. Over a hundred bird species have gone extinct in … See more

Birds live and breed in most terrestrial habitats and on all seven continents, reaching their southern extreme in the snow petrel's … See more

Most birds are diurnal, but some birds, such as many species of owls and nightjars, are nocturnal or crepuscular (active during twilight hours), and many coastal See more

Since birds are highly visible and common animals, humans have had a relationship with them since the dawn of man. Sometimes, these relationships are mutualistic, like the cooperative honey-gathering among honeyguides and African peoples such as the See more