. A history of the birds of Colorado . lets ; this is placed on afoundation of larger sticks, which are built up all roundand above, to form a complete domed nest with aninconspicuous entrance on one side, the whole structurebeing often two to three feet in diameter. It isusually placed in a thick bush from ten to twentyfeet from the ground, though sometimes I have seenone as high as sixty feet in a cotton-wood tree. The eggs, seven or eight in nimiber, are laid betweenApril 15th and 30th in the foothills, and about a fort-night later in the mountains, and the young are hatchedin about eightee
. A history of the birds of Colorado . lets ; this is placed on afoundation of larger sticks, which are built up all roundand above, to form a complete domed nest with aninconspicuous entrance on one side, the whole structurebeing often two to three feet in diameter. It isusually placed in a thick bush from ten to twentyfeet from the ground, though sometimes I have seenone as high as sixty feet in a cotton-wood tree. The eggs, seven or eight in nimiber, are laid betweenApril 15th and 30th in the foothills, and about a fort-night later in the mountains, and the young are hatchedin about eighteen days; normally only one brood isreared. The eggs vary in shape and markings, butare usually grey, heavily blotched with pale brown,and measure 128 x 0-90. Rockwell found eggs asearly as March 31st in Mesa co., at about 6,500 feet. Genus CYANOCITTA. Bill moderate, the basal half covered by nasal plumes which concealthe nostrils ; crown very distinctly crested ; wings and tail approxi-mately o£ equal length ; tail slightly Blue Jay 285 This genus, containing two species now divided into ten geographicalraces, is confined to North America, including the high plateau of Mexicoand Guatemala. Only one species is commonly met with in Colorado,but the eastern Blue Jay occurs as a straggler. Key of the Species. A. Below blue, becoming dusky on the chest. C. stelleri diademata, p. 286. B. Below dirty white, with a black collar across the chest. C. cristata, p. 285. Blue Jay. Cyanocitta cristata. Checklist no 477—Colorado Records—H. G. Smith 05,p. 81 ; 08, p. 186 ; Henderson 05, p. 82. Description.—Adult—General colour above blue, with a purplishtinge ; feathers of the crown elongated and erectile, forming a crest;patch roimd nostrils, above and below the eye, chin, throat and rest ofunder-parts greyish-white; lores, a few frontal feathers and a post-ocular band which extends back and joins a crescentric band across thechest black ; primary-coverts, secondari
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbirds, bookyear1912
