BIRDS OF EASTERN MASSACHUSETTS. 135 



season (1868); they evidently had a nest in the immedi- 

 ate vicinity. I haye seen specimens taken in Massachu- 

 setts in full plumage quite frequently. 



1 52. Accipiter Cooperii, BON. Cooper's Hawk. One 

 of the most common Hawks, called everywhere "Chicken 

 Hawk." Summer resident. I do not think any remain 

 during winter. Breeds, nesting in trees. 



153. Accipiter fuscus, BON. Sharp-shinned Hawk, 

 " Pigeon Hawk." Common summer resident. Breeds. 



154. Buteo borealis, VIEILL. Red-tailed Buzzard, 

 "Red-tailed Hawk." Common resident; exceedingly trouble- 

 some to farmers. This and B. lineatus are the well-known 

 and formidable " Hen- Hawks." Nests in tall trees. 



155. Buteo lineatus, JAE. Red-shouldered Buzzard, 

 " Red-shouldered Hawk," " Hen Hawk." Common resi- 

 dent ; usually more abundant in this immediate locality in 

 winter than during any other season. Breeds, nesting in 

 tall trees, generally in swampy places. 



The following is a description of a Hawk of this species 

 which is remarkably light-colored. This specimen is so 

 different from others of the same species that it was at 

 first supposed to be the Buteo Cooperii, Cass., and was men- 

 tioned as such by Mr. J. A. Allen.* This specimen is also 

 much larger than the average, as will be seen by the table 

 of measurements, and was evidently an immature bird, 

 which corroborates the rule given in the Introduction (p. 

 84) relative to birds decreasing in size with age. 



Description of a light-colored specimen of B. lineatus.^ 



Bill not very large, slightly lobed on the upper man- 

 dible ; color, dark brown. Upper parts dark brown, with 

 each feather spotted and barred irregularly with white and 

 pale rufous, the latter colors predominating on the head 



* " American Naturalist," III. p. 519. 

 t Taken from a mounted specimen. 



