Special Scientific Report--Wildlife 215
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studies (Table 9) yields a range of from 10.2 to 374.5 million birds killed per year on our roads. The variables related to kinds of habitat, and other factors are too complex for analysis with the meager information on hand. For the sake of uniformity and comparability, I will use the figure of 15.1 deaths per mile per year used by Hodson and Snow (1965) for Britain (which, incidentally, is consid- erably lower than the average of five U.S. studies in Table 9) and settle for an estimated annua...l mortality of birds on U.S. roads of 57.2 million.
Television Towers, Ceilometers, and Other Obstructions Sporadic mass avian mortality at towers, tall build- ings, and airport ceilometers has been reported fre- quently; a list of 51 such reports was compiled by Velie (1963), most of the events occurring within the pre- vious decade. A number of reports of such mortality are discussed by Orr (1970:244). Johnston and Haines (1957) reported on 25 instances of mass avian mortal- ity occurring between 5 and 8 October 1954 when 106,804 dead birds were recorded in eastern and south- ern United States.
What to read after Special Scientific Report--Wildlife 215?
You can find similar books in the "Read Also" column, or choose other free books by U.S. Fish And Wildlife Service to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
studies (Table 9) yields a range of from 10.2 to 374.5 million birds killed per year on our roads. The variables related to kinds of habitat, and other factors are too complex for analysis with the meager information on hand. For the sake of uniformity and comparability, I will use the figure of 15.1 deaths per mile per year used by Hodson and Snow (1965) for Britain (which, incidentally, is consid- erably lower than the average of five U.S. studies in Table 9) and settle for an estimated annua...l mortality of birds on U.S. roads of 57.2 million.
Television Towers, Ceilometers, and Other Obstructions Sporadic mass avian mortality at towers, tall build- ings, and airport ceilometers has been reported fre- quently; a list of 51 such reports was compiled by Velie (1963), most of the events occurring within the pre- vious decade. A number of reports of such mortality are discussed by Orr (1970:244). Johnston and Haines (1957) reported on 25 instances of mass avian mortal- ity occurring between 5 and 8 October 1954 when 106,804 dead birds were recorded in eastern and south- ern United States.
What to read after Special Scientific Report--Wildlife 215?
You can find similar books in the "Read Also" column, or choose other free books by U.S. Fish And Wildlife Service to read onlineMoreLess
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