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Mockingbird nests are also often parasitized by cowbirds. [citation needed] The parents are found to reject parasitic eggs at an intermediate rate. [46] A recent study has shown that foreign eggs are more likely to be rejected from a nest later in the breeding season than from earlier in a breeding season.
The tropical mockingbird generally nests from late in the wet season through the transition period into the early wet season. During that long period, it often will produce three broods. It is monogamous but cooperative breeding has been recorded with the young of the previous brood acting as helpers.
The long-tailed mockingbird is 27 to 29.5 cm (10.6 to 11.6 in) long and weighs 54 to 79 g (1.9 to 2.8 oz) with an average of 66.6 g (2.35 oz). Males are slightly larger than females. Adults of the nominate subspecies have a broad white supercilium and a black stripe through the eye that touches a black patch on the white cheek.
There are about 17 species in two genera, although three species of mockingbird from the Galápagos Islands were formerly separated into a third genus, Nesomimus.The mockingbirds do not appear to form a monophyletic lineage, as Mimus and Melanotis are not each other's closest relatives; instead, Melanotis appears to be more closely related to the catbirds, while the closest living relatives of ...
The white-banded mockingbird is 20 to 23.5 cm (7.9 to 9.3 in) long and weighs 49 to 54 g (1.7 to 1.9 oz). The male is slightly larger than the female. Adults have a grayish crown, a white supercilium, a blackish line through the eye, and speckled cheeks. Their upperparts are smoky gray blending to reddish cinnamon on the rump.
The San Cristóbal mockingbird nests from January to April at low elevations and to later at higher ones. Its year round territory is typically 3 to 5 ha (7.4 to 12.4 acres). The species builds a bulky nest of twigs lined with grasses in the crotch of a tree, usually 4 to 5 m (13 to 16 ft) above the ground.
These nests have a unique chambered construction. [3] While many Furnariids have different nests, the hornero nest is the reason for the common name applied to the entire family; ovenbirds (they are unrelated to the parulid warbler called the ovenbird in the United States). The size and exact shape of the hornero nest varies depending on the ...
The chalk-browed mockingbird is 23.5 to 26 cm (9.3 to 10.2 in) long and weighs 55 to 73 g (1.9 to 2.6 oz). Males are slightly larger than females. Adults of the nominate subspecies have a dark brown crown, a broad white supercilium , a blackish line through the eye, and white cheeks.