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Crossbills are specialist feeders on conifer cones, and the unusual bill shape is an adaptation which enables them to extract seeds from cones. These birds are typically found in higher northern hemisphere latitudes, where their food sources grow. They irrupt out of the breeding range when the cone crop fails. Crossbills breed very early in the ...
A conifer cone, or in formal botanical usage a strobilus, pl.: strobili, is a seed-bearing organ on gymnosperm plants, especially in conifers and cycads. They are usually woody and variously conic, cylindrical, ovoid, to globular, and have scales and bracts arranged around a central axis, but can be fleshy and berry-like.
The northern mockingbird is the state bird of Texas. The list of birds of Texas is the official list of species recorded in the U.S. state of Texas according to the Texas Bird Records Committee (TBRC) of the Texas Ornithological Society. As of January 2024, the list contained 664 species. Of them, 170 are considered review species. Eight species were introduced to Texas, two are known to be ...
The northern cardinal is the state bird of seven states, followed by the western meadowlark as the state bird of six states. The District of Columbia designated a district bird in 1938. [4] Of the five inhabited territories of the United States, American Samoa and Puerto Rico are the only ones without territorial birds.
With more than 338 bird species encountered, Acadia National Park is considered one of the premier bird-watching areas in the country, according to National Park Service, and is ranked first by Birda.
The source for birds in the U.S. territories is the Avibase website: Bird checklists of the world (American Samoa), [6] Bird checklists of the world (Guam), [3] Bird checklists of the world (Northern Mariana Islands), [5] Bird checklists of the world (Puerto Rico), [4] Bird checklists of the world (United States Virgin Islands), [9] and Bird ...
At least 284 bird species can be found in Resaca de la Palma State Park, which is about 5 miles north of the Mexico border.. Mexico is among the countries the gray-collared becard is most likely ...
They are specialist feeders on conifer cones, and the unusual bill shape is an adaptation to assist the extraction of the seeds from the cone. The two-barred crossbill has a strong preference for larch (Larix), in Eurosiberia using Siberian larch (Larix sibirica) and Dahurian larch (L. gmelinii), and in North America Tamarack larch (L. laricina).