Tag Archives | Classification of Birds

It is estimated that the total number of bird species that have existed is 154,000, of which 9,600 are alive today. Wetomore (1960) described the 34 orders, out of which 27 orders are of living birds (2 orders of these have recently become extinct) and 7 orders of fossil birds. Class Aves is divided into 2 subclasses. The classification is [...]