366 USEFUL BIRDS. 



Rats and Mice. 



Eats and mice kill some birds. Probably the tree-climbing 

 white-footed or deer mouse is one of the greatest enemies 

 that birds have among these smaller rodents, but under 

 natural conditions it is held in check by Owls. 



FEATHERED ENEMIES. 



Eagles are growing rare, and the more common Bald 

 Eagle feeds mainly on fish, hence it need not be reckoned 

 among the enemies of birds, although it may kill a few crip- 

 pled Ducks. 



Hawks. 



A few species of Hawk are probably the most destructive 

 native natural enemies of birds. Other Hawks kill compara- 

 tively few. The Falcons, represented here b}^ three species, 

 the Sparrow Hawk {Falco sparverius sparverius), Pigeon 

 HaNvk {Falco columbarias columbarius) , and Duck Hawk 

 {Falco peregrinus analum), are pernicious. None of these, 

 however, is very common in the State, and for this reason, 

 mainly, their depredations are not to be compared with those 

 of the bird-killing Hawks. The Sparrow Hawk, a great in- 

 sect killer, kills fewer birds than either of the others, and i-s 

 regarded as a friend to the farmer. The other two Falcons 

 are uncommon or I'are, and therefoi'e kill few birds in this 

 State ; but there are three species of pernicious Hawks : 

 the Goshawk {Astur atricapillus atricapillus) , Cooper's 

 Hawk or "Partridge Hawk" (Accipiter cooperi), and the 

 Sharp-shinned Hawk or " Chicken Hawk " (Accipiter velox) . 

 The Goshawk is an uncommon or periodical winter visitant, 

 but the other two are fairly common, and individually are 

 probably the most destructive of. all the natural enemies of 

 birds. They are slaty or bluish above, with rather short, 

 rounded wings, and long tails. When flying at any height 

 they progress by alternate periods of flapping and soaring. 

 They may be known by their shape and by their manner 

 of flight. 



The Buzzards, or Hen Hawks, so called, get comparatively 

 few birds, but some individuals kill poultry. The Red- 



