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Flock of Quelea quelea (click on image to enlarge it)
Author:Frédéric Salein
Source: Wikimedia Commons

Passeriformes - (finches, crows, etc.)

The Passeriformes are a very large group of birds and include more than half of all bird species. Several are considered important agricultural or nuisance pests and a number are invasive and agressively compete with native bird species. For example queleas like Quelea quelea are important grain eating species which form large swarms and can destroy fields in Africa.

The group is characterized by the structure of their feet with three toes pointing forward and one back. This facilitates perching.

The following genera and individual species are currently entered in the system: