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Petroicidae
The bird family Petroicidae includes roughly 45 species in about 15 genera. All are endemic to Australasia: New Guinea, Australia, New Zealand and numerous Pacific Islands as far east as Samoa. For want of an accurate common name, the family is often called the Australasian robins. Within the family the species are known not only as robins but as scrub-robins and flycatchers. They are, however, only distantly related to the Old World family Muscicapidae (to which other species with such names belong) and the monarch flycatchers (Monarchidae).
==Characteristics==
Most species have a compact build with a large, rounded head, a short, straight bill, and rounded wingtips. They occupy a wide range of wooded habitats, from subalpine to tropical rainforest, and mangrove swamps to semi-arid scrubland. All are primarily insectivorous, although a few supplement their diet with seeds. Hunting is mostly by perch and pounce, a favoured tactic being to cling sideways onto a treetrunk and scan the ground below without moving.
Social organisation is usually centered on long-term pair-bonds and small family groups. Most members of the subfamily Eopsaltrinae practice cooperative breeding, with all family members helping defend a territory and feed nestlings.
Nests are cup-shaped, usually constructed by the female, and often placed in a vertical fork of a tree or shrub. Many species are expert at adding moss, bark or lichen to the outside of the nest as camouflage, making it very difficult to spot, even when it is in a seemingly prominent location.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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