Birds From Coahuila, Mexico
Birds From Coahuila, Mexico
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_Molothrus ater ater_ (Boddaert). --_Specimen examined:_ one, [Female]31513, from 21 mi. S, 11 mi. E Australia, 4400 ft. , May 3, 1954, measurements: wing, 102 mm. ; tail, 64 mm. ; tarsus, 26 mm. ; culmen, 17mm.
This subspecies of the Brown-headed Cowbird is uncommon in Coahuila. Amadon and Phillips (1947:579) took an adult male and a juvenile female_M. A. Ater_ at Las Delicias on August 15, both of which wereconsidered early migrants. Dickerman obtained No. 31513 from a flock ofeight cowbirds.... Although the measurements of this specimen agreeequally well with those of _M. A. Ater_ and _M. A. Artemisiae_(Grinnell, 1909:275-281), the shape of the bill most closely resemblesthat of _ater_. Grinnell (1909:278) said that "_ater_ has a tumid bill, broad and high at [the] base with [a] conspicuously arched culmen"whereas "_artemisiae_ has a longer and relatively much slenderer bill, vertically shallow at [the] base and laterally compressed, with theculmen in its greater portion straight or even slightly depressed.
What to read after Birds From Coahuila, Mexico?
You can find similar books in the "Read Also" column, or choose other free books by Urban Emil K. to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
_Molothrus ater ater_ (Boddaert). --_Specimen examined:_ one, [Female]31513, from 21 mi. S, 11 mi. E Australia, 4400 ft. , May 3, 1954, measurements: wing, 102 mm. ; tail, 64 mm. ; tarsus, 26 mm. ; culmen, 17mm.
This subspecies of the Brown-headed Cowbird is uncommon in Coahuila. Amadon and Phillips (1947:579) took an adult male and a juvenile female_M. A. Ater_ at Las Delicias on August 15, both of which wereconsidered early migrants. Dickerman obtained No. 31513 from a flock ofeight cowbirds.... Although the measurements of this specimen agreeequally well with those of _M. A. Ater_ and _M. A. Artemisiae_(Grinnell, 1909:275-281), the shape of the bill most closely resemblesthat of _ater_. Grinnell (1909:278) said that "_ater_ has a tumid bill, broad and high at [the] base with [a] conspicuously arched culmen"whereas "_artemisiae_ has a longer and relatively much slenderer bill, vertically shallow at [the] base and laterally compressed, with theculmen in its greater portion straight or even slightly depressed.
What to read after Birds From Coahuila, Mexico?
You can find similar books in the "Read Also" column, or choose other free books by Urban Emil K. to read onlineMoreLess
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