Stelgidopteryx serripennis (A) Purple martin (), Progne subis (A) Barn swallow (), Hirundo rustica Common house-martin (), Delichon urbica (A) Cliff swallow (), Petrochelidon pyrrhonota (A) Kinglets Order: PasseriformesFamily: Regulidae The kinglets are a small family of birds which resemble the titmice. They are very small insectivorous birds. The adults have coloured crowns, giving rise to their name. Ruby-crowned kinglet (), Corthylio calendula Golden-crowned kinglet (), Regulus satrapa Waxwings Order: PasseriformesFamily: Bombycillidae The waxwings are a group of passerine 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. These are arboreal birds of northern forests. They live on insects in summer and berries in winter. Bohemian waxwing (), Bombycilla garrulus (A) Cedar waxwing (), Bombycilla cedrorum Nuthatches Order: PasseriformesFamily: Sittidae Nuthatches are small woodland birds. They have the unusual ability to climb down trees head first, unlike other birds which can only go upwards. Nuthatches have big heads, short tails, and powerful bills and feet. Red-breasted nuthatch (), Sitta canadensis 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. Brown creeper (), Certhia americana (A) 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 grey in colour 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-grey gnatcatcher (), Polioptila caerulea (A) 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. House wren (), Troglodytes aedon (A) Winter wren (), Troglodytes hiemalis 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 greys and browns in their appearance. Grey catbird (),