Rose-breasted grosbeak Facts

Rose-breasted grosbeak Facts
Rose-breasted grosbeak is a songbird that belongs to the cardinal family. It can be found in North America during the breeding season, and in the South America and parts of the Europe during the winter. Rose-breasted grosbeak inhabits deciduous and mixed forests, areas near the streams and marshes. It can be also found in the orchards, parks and gardens. Rose-breasted grosbeaks are threatened by intense deforestation. Luckily, wild population of these birds is still large and stable. Rose-breasted grosbeaks are not on the list of endangered species.
Interesting Rose-breasted grosbeak Facts:
Rose-breasted grosbeak can reach 7.1 to 8.3 inches in length and 1.4 to 1.7 ounces of weight.
Upper parts of the male's body are black. Bottom side of the body and rump are white. Red or pinkish patch covers breasts of male rose-breasted grosbeaks. Females are brown with dark-colored stripes on dorsal and lateral sides of the body.
Rose-breasted grosbeak has large, cone-shaped beak that is usually pink-colored.
Rose-breasted grosbeak eats insects and various types of seed and fruit. Berries are predominant source of food during the winter.
Rose-breasted grosbeak migrates toward the south at the beginning of the autumn. It travels during the night in flocks composed of up to 50 birds.
Rose-breasted grosbeak produces melodic, warbled songs that sound like songs of American robin with slightly shorter phrases.
Female picks the male who sings the most beautiful songs during the mating season. Male accepts her company after day or two. Bond between pair of rose-breasted grosbeaks lasts for a lifetime (monogamous birds).
Rose-breasted grosbeaks are territorial during the breeding season. Both males and females aggressively defend their territory against intruders.
Experiments with live birds showed that white ramp and white markings on lateral sides of the body trigger aggressive behavior in male rose-breasted grosbeaks during the breeding season (red markings on the breasts do not trigger aggression).
Males and females build nest in the trees together. Nest is cup-shaped and made of twigs, decaying leaves and straws. It is porous and eggs can be seen from below.
Female lays 1 to 5 pale green or bluish eggs. Both males and females participate in the incubation of eggs during a period of 11 to 14 days.
Hatchlings are helpless at birth and depend on their parents until the age of 30 days. They leave the nest 9 to 12 days after hatching.
Rose-breasted grosbeak and black-headed grosbeak can interbreed in areas where members of their own species cannot be found. Produced offspring can inherit characteristics of both parents or just of one of them.
Blue jay, common grackles and red and grey squirrels feed on eggs and young chicks. Adult rose-breasted grosbeak are targeted by several species of hawks.
Rose-breasted grosbeak can survive more than 12 years in the wild.

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