an order of birds containing those perching which comprise about half the known species of bird. Mostly small, living near the ground and having four toes arranged to allow gripping of the perch. Young helpless at hatching. Rooks, Finches, Sparrows, Tits, Warblers, Robins, Wrens, Swallows and many others., suurim linnuselts; 63 sgk-a, 5712 liiki ... evolutsiooniliselt kõrgastmel olev ja msg. elutingimustega paremini kohastunud linnurühm