Leaf warblers are small insectivorous passerine birds belonging to the genus Phylloscopus.
Leaf warbler
Illustration of Phylloscopus bonelli, Phylloscopus coronatus, Phylloscopus trochilus, Phylloscopus sibilatrix by John Gerrard Keulemans
A passerine is any bird of the order Passeriformes which includes more than half of all bird species. Sometimes known as perching birds, passerines generally have an anisodactyl arrangement of their toes, which facilitates perching.
Passerine
Pterylosis or the feather tracts in a typical passerine
Male superb lyrebird (Menura novaehollandiae): This unique songbird shows strong sexual dimorphism, with a peculiarly apomorphic display of plumage in males.
Wieslochia fossil