H. rama H. pallida H. languida H. olivetorum H. opaca H. polyglotta H. icterina
Tree warblers are medium-sized birds belonging to the genus Hippolais of the Old World warbler family Sylviidae. They occur in Europe, Africa and western Asia.
These warblers are always associated with trees, though normally in fairly open woodland rather than tight plantations. They are quite clumsy in their movements.
These are plump, strong-looking birds with long bills, strong feet and long wing. Most are unstreaked greenish or brownish above and cream or white below. They are insectivorous, but will occasionally take berries or seeds.
Species breeding in temperate regions are usually strongly migratory.
Tree fern (Bot.), an arborescent fern having a straight trunk, sometimes twenty or twenty-five feet high, or even higher, and bearing a cluster of fronds at the top.
Tree hopper (Zo["o]l.), any one of numerous species of small leaping hemipterous insects which live chiefly on the branches and twigs of trees, and injure them by sucking the sap.
Tree swallow (Zo["o]l.), any one of several species of swallows of the genus Hylochelidon which lay their eggs in holes in dead trees.
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