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For example, the male great-tailed grackle is 60% heavier than the female. The smallest icterid species is the orchard oriole , in which the female averages 15 cm in length (6 in) and 18 g (0.040 lb) in weight, while the largest is the Amazonian oropendola , the male of which measures 52 cm (20 in) and weighs about 550 g (1.21 lb).
The adult female is sooty-brown with a dull yellowish-brownish bill, a brownish-white throat and some weak mottling on the breast. The juvenile is similar to the female, but has pale spots on the upperparts, and the very young juvenile also has a speckled breast. Young birds vary in the shade of brown, with darker birds presumably males. [19]
The red-winged blackbird (Agelaius phoeniceus) is a passerine bird of the family Icteridae found in most of North America and much of Central America. It breeds from Alaska and Newfoundland south to Florida, the Gulf of Mexico, Mexico, and Guatemala, with isolated populations in western El Salvador, northwestern Honduras, and northwestern Costa Rica.
The female is brownish-grey with slight hints of the male's iridescence. The female's eye is dark brown, while the male's is bright yellow. Overall, they resemble the eastern member of the same genus, the rusty blackbird; Brewer's blackbird, however, has a shorter bill and the male's head is iridescent purple. [2]
A bare patch of skin that most female birds gain during the nesting season for thermoregulation purposes, by shedding feathers close to the belly, in an area that will be in contact with the eggs during incubation. The patch of bare skin is well supplied with blood vessels at the surface, facilitating heat transfer to the eggs. [56] brood parasite
Flocks of black birds have been spotted in backyards and parks over the past few weeks in the Triangle, causing many of us to do a double take when we leave our homes or pass a large, grassy field.
The adult is a medium-sized blackbird with a rounded tail. The male is 25.5 cm (10.0 in) long and weighs 108 g (3.8 oz). The slightly smaller female is 23 cm (9.1 in) long and weighs 95 g (3.4 oz). The adult plumage is entirely black with a bluish gloss, and the bill, legs and feet are also black. The iris is brown.
The legs and the iris are black and the bill is long and sharply pointed. The male could be confused with the velvet-fronted grackle or the chopi blackbird . Its call of this bird is a loud "tchew-tchew-tchew" which is sung from an elevated position, [ 3 ] [ 4 ] and it also produces various trills and rattling sounds which vary in tone and pitch.