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The South Bay California gull population has grown from less than 1,000 breeding birds in 1982 to over 33,000 in 2006. This population boom has resulted in large resident flocks of gulls that will opportunistically prey on other species, particularly the eggs and nestlings of other birds.
The Pacific gull is a large white-headed gull with a distinctively heavy bill.. Gulls range in size from the little gull, at 120 grams (4 + 1 ⁄ 4 ounces) and 29 centimetres (11 + 1 ⁄ 2 inches), to the great black-backed gull, at 1.75 kg (3 lb 14 oz) and 76 cm (30 in).
Immature birds are gray-brown and are darker and more uniform than European herring gulls, with a darker tail. As is common with other gulls, they are colloquially referred to simply as seagulls . It occurs in a variety of habitats including coasts, lakes, rivers, parking lots and garbage dumps .
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Mobbing can also be used to obtain food, by driving larger birds and mammals away from a food source, or by harassing a bird with food. One bird might distract while others quickly steal food. Scavenging birds such as gulls frequently use this technique to steal food from humans nearby. A flock of birds might drive a powerful animal away from food.
U.S. birds display a wide array of striking hues. But just how colorful are our American birds? What you need to know from our study.
It’s unclear why the man plowed into the colony of seagulls along the beach and whether it was intentional. The alleged driver of a Jeep that plowed into and killed 25 seagulls on a beach in ...
Aggressive calls accompany attacks on predators. Contact calls are signals used for intra-specific communication. The most commonly heard cat-like sound ("mew call") is a part of the contact call, and is frequently used, such as when returning to the nest after taking food, alternating the role of the mating and nesting, taking care of the ...