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The California myotis is largely free of ectoparasites commonly found on other bat species, such as fleas, ticks, flies, lice, and bed bugs. However, mites have occasionally been found on the dorsal wings of the California myotis. [4] The dental formula for M. californicus is 2.1.3.3 3.1.3.3 × 2 = 38 [5] Skull of a California Myotis
There are five currently recognized subspecies of white-crowned sparrow (pugetensis, gambelii, nuttalli, oriantha, and leucophrys), varying in breeding distribution migratory route. Birds of the subspecies nuttalli are permanent residents in California, while birds of the subspecies gambelli may migrate as far as the Arctic Circle during the ...
The California least tern (Sternula antillarum browni) is a subspecies of least tern that breeds primarily in bays of the Pacific Ocean within a very limited range of Southern California, in San Francisco Bay and in northern regions of Mexico. This migratory bird is a U.S. federally listed endangered subspecies. The total population of the ...
Sometimes, journeys are not termed "true migration" because they are irregular (nomadism, invasions, irruptions) or in only one direction (dispersal, movement of young away from natal area). Non-migratory birds are said to be resident or sedentary. Approximately 1,800 of the world's 10,000 bird species are long-distance migrants. [17] [18]
When prey is spotted, it dives down, quickly grabs the animal with its talons, and flies back up to eat. [ 10 ] White-tailed kites feed principally on rodents (as well as small opossums , shrews , reptiles , amphibians and large insects ), [ 11 ] and they are readily seen patrolling or hovering over lowland scrub or grassland.
Nature is a wildlife television series produced by Thirteen/WNET New York. It has been distributed to United States public television stations by the PBS television service since its debut on October 10, 1982. Some episodes may appear in syndication on many PBS member stations around the United States and Canada, and on the Discovery Channel. As of 2022, the series airs on Wednesdays on PBS ...
The species — several birds, mussels, two species of fish and the Little Mariana fruit bat last seen in Guam in 1968 — have been listed as endangered for decades, according to the U.S. Fish ...
Studies completed in Utah in the 1960s (before this species was added to the Migratory Bird Treaty Act) showed that 82.9% of recorded deaths in banded birds were a result of being shot. [5] However, the main causes of the decline of this species previously were pesticides and habitat destruction. [ 6 ]
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