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[agsense.net](http://www.agsense.net/agsense-solutions/agsense-app/alert)<br>They act to close the toes (therefore to know a perch). Within the Eurylaimidae these tendons are related by a brief band (vinculum), however in all other passerines they are entirely separate. This difference has been used by some to divide the passerines into two major teams: the Desmodactyli (vinculum present) and the Eleutherodactyli (vinculum absent). Passeriforms at the moment are the dominant group of fashionable birds. The 5,seven-hundred extant species make up 60 % of all birds of the world. Ornithologists dispute many details of their evolutionary historical past, but virtually all agree that they are monophyletic |
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