The Richest and Poorest Avifauna in the world

The Richest Avifauna in the world South America - over 2,500 breeding species The Neotropical Region — South America, known as the 'bird continent', is already credited with over 2,500…

Bird Populations and Distribution Despite the fairly large number of professional ornithologists and ecologists now scattered around the world, and the ever-increasing army of amateurs who volunteer to help with…

Tyrant Flycatchers (Tyrannidae) - The Largest Bird Family in the world This very diverse bird family of some 90 genera is entirely restricted to the New World, chiefly the Neotropical…

Passenger Pigeon - The Most Numerous Bird Ever It is not possible to give an accurate estimate of the population of Passenger Pigeon, North American bird (Ectopistes migratorius), as it…

Stephens Island Wren or Lyall's Wren - The smallest flightless bird ever This may well be the Inaccessible Island rail which is still alive today, but there is one extinct…

Aepyornis maximus - The Elephant Birds For a long time, Aepyornis maximus was thought to be the heaviest bird ever but it is now thought to have tipped the scales…

Argentavis Magnificens (Wingspan 7-7.6 m (23-25 ft)) - The Largest Bird Which Ever Flew The bird world was turned upside down in 1979 when two well-known Argentinian paleontologists announced that they…

One species of the recently discovered Piotopterids was over 2 m (6.5 ft) long. These huge, flightless Pelecaniformes of the northern hemisphere occurred in the late Oligocene and early Miocene…

Dinornis maximus Bird Facts The giant moa Dinornis maximus was less than half the weight of Dromornis stirtoni, at about 227 kg (500 lb), but it was significantly taller, the…

History of Australian Dromornis Stirtoni - The heaviest bird that ever lived Weighing half a ton (over 500 kg (1,100 1b)), Dromornis was one form of a group of giant…