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Thursday, August 18, 2016

Brown Headed Cowbird

The Brown Headed Cowbird are very interesting birds. The bird is sexual dimorphism which means the male and female look very differently from each other. The male has a brown head and has a glossy black plumage. The female and the juvenile look alike because they both have brown plumage but, the juvenile has streaks on it's chest. They have a cone shaped beak to to crush seeds and nuts. They also eat insects such as grasshoppers and beetles. What's very interesting about these birds is that they brood parasites which means that they don't build their own nests to lay their, instead they lay their eggs on other bird's nest. If the cowbird finds a nest it would either move the eggs inside it to make some room, or it would take the egg out of the nests an they might eat the egg. When the birds mate the female choose their mates. The  male would try to impress the female by singing to her, fluff their feathers and even bow down to them. They are mostly monogamous but if the female feels like the male isn't pleasing her correctly, they would leave the male and look for another.  The cowbirds are located in Northern Mexico, The United States, and most of Canada. They live in open areas, grasslands, and woodlands. When they migrate they migrate with flocks of other black birds and they don't go to far they only go as far as 530 miles. This bird was very fun to research. 

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