34 ROCHESTER ACADEMY OF SCIENCE. 



Familj' FALCONIDAE. Falcons, hawks, eagles, etc. 



331. Circus hudsonius (Linn.) Marsh hawk. 



Summer resident ; fairly common. April I — Oct. 20. Fre- 

 quents low meadows and swamps, flying and perching low. Like all 

 hawks, migrates by day. Nest, on the ground amidst the grass and 

 low bushes of the marsh, May 5-20 ; eggs, 4-5. Rather more 

 injurious than the red-tail, but destroys more mice than birds. 



332. Accipiter velox (Wils.) Sharp-shinned hawk. 



Summer resident, fairly common. Apr. i — Nov. 10. Like the 

 following species, rarely seen in winter. Frequents mixed woodlands. 

 Nest, usually in evergreen trees, 12-40 feet from the ground. May 8 

 — June 5 ; eggs, 3-5. Injurious ; feeds almost exclusively on small 

 birds, often visiting the orchard and farmyard. 



333. Accipiter cooperii (Bonap.) Cooper's hawk. 



Summer resident ; fairly common. Apr. I — Nov. 15 ; occa- 

 sional in winter. Found in mixed woodlands, often coming into the 

 fields, orchards and farmyards in search of birds. Nest, in the fork 

 of a tree, 25-50 feet from the ground. May 1-20 ; eggs, 3-5. 

 Injurious ; feeds principally on birds and poultry. 



334. Accipiter atricapillus (Wils.) American goshawk. 

 Winter visitant ; uncommon. Oct. 21 — Mar. 20. Many records. 



Found in woodlands of mixed evergreen and deciduous trees. Some- 

 times comes to the barnyard in quest of pigeons and chickens. 

 Injurious ; very destructive to game and poultry. 



337. Buteo borealis (Gmel.) Red-tailed hawk. 



Resident ; common. More partial to rugged, hilly woodlands 

 than the following species. Nest, in a tall tree. Mar. 15 — Apr. 20 ; 

 eggs, 2-4. This hawk is more destructive to poultry, game and 

 small birds than our other "buzzards," but does much good by 

 destroying mice and red squirrels. 



339. Buteo lineatus (Gmel. ) Red-shouldered hawk. 



Summer resident ; common. Mar. i — Nov. 15. Occasional 

 resident. Found in swampy woods. Nest, in the fork of a decid- 

 uous tree, 30-70 feet from the ground, Apr. i — May 10 ; eggs, 

 3-5. Mainly beneficial ; food, mice, frogs, insects, etc. 



342. Buteo swainsoni Bonap. Swainson's hawk. 



Accidental visitant. Brockport, Oct. i, 1889 — Short, p. 10. 



