They have thin pointed down-curved bills, which they use to extricate insects from bark. They have stiff tail feathers, like woodpeckers, which they use to support themselves on vertical trees. Order: PasseriformesFamily: Troglodytidae  Wrens are small and inconspicuous birds, except for their loud songs. They have short wings and thin down-turned bills. Several species often hold their tails upright. All are insectivorous. Order: PasseriformesFamily: Polioptilidae  These dainty birds resemble Old World warblers in their structure and habits, moving restlessly through foliage while seeking insects. The gnatcatchers are mainly a soft bluish gray in color and have the long sharp bill typical of an insectivore. Many species have distinctive black head patterns (especially males) and long, regularly cocked black-and-white tails. Order: PasseriformesFamily: Regulidae  The kinglets are a family of birds which are very small insectivorous birds in the genus "Regulus". The adults have colored crowns, giving rise to their name. Order: PasseriformesFamily: Turdidae  The thrushes are a group of passerine birds that occur mainly but not exclusively in the Old World. They are plump, soft plumaged, small to medium-sized insectivores or sometimes omnivores, often feeding on the ground. Many have attractive songs. Order: PasseriformesFamily: Mimidae  The mimids are a family of passerine birds which includes thrashers, mockingbirds, tremblers, and the New World catbirds. These birds are notable for their vocalization, especially their remarkable ability to mimic a wide variety of birds and other sounds heard outdoors. The species tend towards dull grays and browns in their appearance. Order: PasseriformesFamily: Sturnidae  Starlings are small to medium-sized Old World passerine birds with strong feet. Their flight is strong and direct and most are very gregarious. Their preferred habitat is fairly open country, and they eat insects and fruit. The plumage of several species is dark with a metallic sheen. Order: PasseriformesFamily: Bombycillidae  The waxwings are a group of birds with soft silky plumage and unique red tips to some of the wing feathers. In the Bohemian and cedar waxwings, these tips look like sealing wax and give the group its name.