Nov., 1918 



NESTING OF THE ROCKY MOUNTAIN JAY 



207. 



ton cloth spread between the twig foundation and the nest proper. (See 

 fig. 40.) 



No. 2. Base and framework, which extends to top of nest, 7x9 inches; 

 total depth 4 inches ; composed of pine and occasional spruce twigs, with some 

 grasses interwoven. There are also visible six large empty cocoons each about 

 three-quarters of an inch long. Cup inside 3x3% inches in diameter, depth 1% 

 inches. Nest proper composed of fine grasses and bark fiber neatly and close- 

 ly woven together, and warmly lined with chicken and occasional grouse and 



Fig. 44. Rocky Mountain Jay, in Estes 

 Park, Colorado. His actions created 

 the delusion that his nest would be 

 easy to find. 





jay feathers. The walls are about one inch thick. (See fig. 41.) 



No. 3. Outside measurement, 6!/2x7 inches in diameter, depth 3 inches. 

 The entire structure is composed of spruce twigs and tree moss, with a small 

 amount of coarse wood fiber and an occasional feather, all very closely and 

 firmly intermixed and woven together. The cup is lined with tree moss, grouse 

 and few other feathers. Inside measurements, 3% inches diameter, depth 1% 

 inches. (See fig. 42.) 



(The above would indicate the only material available.) 



EGGS 



Color (by F. M. Chapman color chart) : ground light pearl gray, spotted 



