They are quite large Tony. Here's a description for you.
Brown Thrasher
Toxostoma rufum
Description 11 1/2" (29 cm). Rufous-brown above, white below with dark brown streaks. Curved bill, long tail; yellow eye. See Long-billed Thrasher.
Voice A variety of musical phrases, each repeated twice; call a sharp smack!
Habitat Thickets, fields with scrub, and woodland borders.
Nesting 4 or 5 pale blue, brown-dotted eggs in a large, coarsely built nest of twigs, leaves, and rootlets lined with grass. The nest is usually near the ground in a dense, often thorny bush.
Range Breeds from southeastern Alberta, Manitoba, Ontario, and northern New England south to Gulf Coast and Florida. Winters in southern part of breeding range.