pas·ser·ine 
(păsə-rīn′)
(păsə-rīn′)adj.
Of or relating to birds of the order Passeriformes, which have feet specialized for grasping branches and similar structures, with the first toe facing backward. The order includes the songbirds and certain other groups, such as the flycatchers of the Americas.
n.
A bird of the order Passeriformes. Also called perching bird.
[Latin passerīnus, of sparrows, from passer, sparrow.]