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In the U.S. state of Colorado 519 species of birds have been documented as of September 2022 according to the Colorado Bird Records Committee (CBRC) of Colorado Field Ornithologists. [ 1 ] This list is presented in the taxonomic sequence of the Check-list of North and Middle American Birds , 7th edition through the 63rd Supplement, published by ...
Population density is defined as the population divided by land area. Data are from the US Census unless otherwise specified. Population data are for the year 2023 [2] and area data are for the year 2010. [3] Some population estimates for territories are from the United Nations Commission on Population and Development. [4]
First ski lift in Colorado opens at Berthoud Pass on February 7, 1937; Lowry Field, 1938–1994; Winter Park Ski Area opens December 1939; World War II, September 1, 1939 – September 2, 1945 United States enters Second World War on December 8, 1941; Fort Carson, since January 31, 1942; Rocky Mountain Arsenal, June 30, 1942 – October 9, 1992
The average global population of all mature birds is estimated to be on the order of 100 billion individuals. [1] [2] [3] The total population including younglings is somewhat higher during the breeding season of each species. [3] This list is incomplete, because experts have not estimated all bird numbers.
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.
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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 ...
Sphenisciformes (from the Latin for "wedge-shaped") is the taxonomic order to which the penguins belong. BirdLife International has assessed 18 species. 16 (89% of total species) have had their population estimated: those missing are the king and little penguins, both of which have been assessed as being of least concern. [1] [2]