head first, unlike other birds which can only go upwards. Nuthatches have big heads, short tails, and powerful bills and feet. Three species have been recorded in Wyoming. Red-breasted nuthatch, Sitta canadensis White-breasted nuthatch, Sitta carolinensis Pygmy nuthatch, Sitta pygmaea Treecreepers Order: PasseriformesFamily: Certhiidae Treecreepers are small woodland birds, brown above and white below. 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. One species has been recorded in Wyoming. Brown creeper, Certhia americana Gnatcatchers Order: PasseriformesFamily: Polioptilidae These dainty birds resemble 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. One species has been recorded in Wyoming. 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. Nine species have been recorded in Wyoming. Rock wren, Salpinctes obsoletus Canyon wren, Catherpes mexicanus House wren, Troglodytes aedon Pacific wren, Troglodytes pacificus Winter wren, Troglodytes hiemalis Sedge wren, Cistothorus platensis (A) Marsh wren, Cistothorus palustris Carolina wren, Thryothorus ludovicianus (A) Bewick's wren, Thryomanes bewickii 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. Five species have been recorded in Wyoming. Gray catbird, Dumetella carolinensis Curve-billed thrasher, Toxostoma curvirostre (A) Brown thrasher, Toxostoma rufum Sage thrasher, Oreoscoptes montanus Northern mockingbird, Mimus polyglottos Starlings Order: PasseriformesFamily: Sturnidae Starlings are small to medium-sized passerine birds. They are medium-sized passerines 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. One species has been recorded in Wyoming. European starling, Sturnus vulgaris (I) Dippers Order: PasseriformesFamily: Cinclidae Dippers are small, stout, birds that feed in cold,