Old World warblers in their structure and habits, moving restlessly through the foliage seeking insects. The gnatcatchers are mainly soft bluish gray in color and have the typical insectivore's long sharp bill. Many species have distinctive black head patterns (especially males) and long, regularly cocked, black-and-white tails. Blue-gray gnatcatcher, Polioptila caerulea Wrens 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. Rock wren, Salpinctes obsoletus Canyon wren, Catherpes mexicanus House wren, Troglodytes aedon Pacific wren, Troglodytes pacificus Winter wren, Troglodytes hiemalis Sedge wren, Cistothorus platensis Marsh wren, Cistothorus palustris Carolina wren, Thryothorus ludovicianus Bewick's wren, Thryomanes bewickii Cactus wren, Campylorhynchus brunneicapillus Mockingbirds and thrashers 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. Gray catbird, Dumetella carolinensis Curve-billed thrasher, Toxostoma curvirostre Brown thrasher, Toxostoma rufum Long-billed thrasher, Toxostoma longirostre Bendire's thrasher, Toxostoma bendirei Sage thrasher, Oreoscoptes montanus Northern mockingbird, Mimus polyglottos Starlings Order: PasseriformesFamily: Sturnidae Starlings are small to medium-sized passerine birds with strong feet. Their flight is strong and direct and they are very gregarious. Their preferred habitat is fairly open country, and they eat insects and fruit. Plumage is typically dark with a metallic sheen. European starling, Sturnus vulgaris (I) Dippers Order: PasseriformesFamily: Cinclidae Dippers are a group of perching birds whose habitat includes aquatic environments in the Americas, Europe, and Asia. They are named for their bobbing or dipping movements. These birds have adaptations which allows them to submerge and walk on the bottom to feed on insect larvae. American dipper, Cinclus mexicanus Thrushes and allies 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. Eastern bluebird, Sialia sialis Western bluebird, Sialia mexicana Mountain bluebird, Sialia currucoides Townsend's solitaire, Myadestes townsendi Veery, Catharus fuscescens Gray-cheeked thrush, Catharus minimus Swainson's thrush, Catharus ustulatus Hermit thrush, Catharus guttatus Wood thrush, Hylocichla mustelina Rufous-backed robin, Turdus rufopalliatus American