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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
The common nighthawk or bullbat (Chordeiles minor) is a medium-sized [3] [4] crepuscular or nocturnal bird [3] [5] of the Americas within the nightjar (Caprimulgidae) family, whose presence and identity are best revealed by its vocalization.
[34] [35] However most bird migration is in the range of 150 to 600 m (490–2,000 ft). Bird strike Aviation records from the United States show most collisions occur below 600 m (2,000 ft) and almost none above 1,800 m (5,900 ft). [36] Bird migration is not limited to birds that can fly. Most species of penguin (Spheniscidae) migrate by ...
Robertson and Loss were two of four co-authors on a study that looked at the migrations of 150 bird species along flyways from South America to the high Arctic, using remote sensing and satellite ...
In the US, it is protected by the Migratory Bird Treaty Act of 1918, and in Canada by the Migratory Birds Convention Act. This swallow is negatively affected by human activities, such as the clearing of forests; acidified lakes can force a breeding tree swallow to go long distances to find calcium-rich food items to feed to its chicks.
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 migration of the subspecies Limosa lapponica baueri across the Pacific Ocean from Alaska to New Zealand is the longest known non-stop flight of any bird, and also the longest journey without pausing to feed by any animal. The round-trip migration for this subspecies is over 29,000 km (18,020 mi).
The common black-hawk is a breeding bird in the warmer parts of the Americas, from the Southwestern United States through Central America to Venezuela, Peru, Trinidad, and the Lesser Antilles. It is a mainly coastal, resident bird of mangrove swamps, estuaries and adjacent dry open woodland, though there are inland populations, including a ...