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Black-headed grosbeaks frequently sing from prominent perches. Both the male and female sing, but have different songs, and both are known to sing from the nest while incubating. When trying to court a female, males fly with their wings and tails spread. They forage in the foliage, on the ground, or in low vegetation and are prominent berry eaters.
Evidence or proof of breeding such as adults with enlarged gonads, nests with eggs, and a fledged chick have been noted between November and January. Nests are an open cup made of vine stalks and lined with fine fibers placed up to 3 m (9.8 ft) high in a shrub. The plush-crested jay (Cyanocorax chrysops) is a frequent predator at the nest. [3]
The following is a list of grosbeak species, arranged in groups of closely related genera. These genera are more closely related to smaller-billed birds than to other grosbeaks. Exceptions are the three genera of "typical grosbeak finches", which form a group of closest living relatives and might thus be considered the "true" grosbeaks.
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Typically, fewer than 7% of grosbeak nests have cowbird eggs per one study. [38] Per the U.S. Bird Banding Laboratory, as of 1997, rose-breasted grosbeaks recovered when dead have largely collided with objects, including buildings and cars (17.2%) or had been shot (10%; mostly before 1960), 3.6% of the fatalities were caught by cats , 0.8% ...
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The grosbeaks are an interesting group of birds. Here in New England, you are most likely to see rose-breasted grosbeaks, but we also have pine grosbeaks, and evening grosbeaks (blue and black ...
The evening grosbeak is similar in appearance to the Eurasian hawfinch, both being bulky, heavily built finches with large bills and short tails. The evening grosbeak ranges in length from 16 to 22 cm (6.3 to 8.7 in) and spans 30 to 36 cm (12 to 14 in) across the wings.