Canada Warbler

The Canada warbler is sometimes called the "necklaced warbler", because of the band of dark streaks across its chest. The adults have minimal sexual dimorphism, although the male's "necklace" is darker and more conspicuous and also has a longer tail. Adults are 12–15 cm (4.7–5.9 in) long, have a wingspan of 17–22 cm (6.7–8.7 in), and weigh 9–13 g (0.32–0.46 oz). The chest, throat, and belly of the bird are yellow, and its back is dark grey. It has no wingbars or tail spots, but the underside of the tail is white. Voice: The of this bird is loud and highly variable, resembling chip chewy sweet dichetty. Their calls are low chup's. A 2013 study showed that male Canada warblers have two performance-encoded song types. Mode I, used mostly during the day, when unpaired either alone or near a female during early nesting, involves stereotyped songs sung slowly and regularly.