The Canada Warbler is a small, brightly coloured songbird with bluish grey upper-parts and yellow under-parts. A series of patterned black spots form a "necklace" on its bright yellow breast, but tends to be greyer and less defined in females. Other features such as the white eye ring, thin pointed bill and white feathers at the base of the tail help to distinguish this bird from similar species.
Weight: 9 to 13 g (0.3 to 0.5 oz). Length: 12 to 15 cm (4.7 to 5.9 in).