An order of birds, formerly established to incorporate the perching birds, nevertheless now generally speaking viewed as an artificial group.
In ornithology: The perchers; in Vigors's system of classification, adopted by Swainson and many more, an extensive order of wild birds, of arboreal practices, having the legs fitted for perching, with 3 toes in the front and 1 behind, and never raptorial.
a bird with foot adapted for perching (as on tree branches); this order is currently generally speaking abandoned by taxonomists
Definition for "insessores"
An order of birds, formerly established to incorporate…