58 



52. Haliceetus leucocephalus (Linn.). 

 BALD EAGLE. 



Brown; head and tail -white in adult. Length, 3336 Inches. 



Rare and accidental visitor, occasionally seen near, or 

 flying towards, the mountains by the Connecticut river. 



S3, Falco rusticolus (Linn.). 

 GYRFALCON. 



Ahove, more or less imperfectly barred "With dark hro"wn and pale ash;, 

 beneath, white streaked with dusky. Length, 24 inches. 



Very rare winter visitor. One specimen taken at Northamp- 

 ton in the winter of 1879, by Mr. E. O. Damon. The speci- 

 men is now in the Science building, Springfield, and is said to be- 

 subspecies gyrfalco. (Morris.) 



54. Falco peregrinus anatum (Bonap.). 

 DUCK HAWK. 



ADove, dark bluish-ash; beneath creamy-white spotted or streaked with 

 blackish except on throat and upper breast; adult barred rather than 

 streaked beneath. Length, 19 inches. 



Very rare summer resident, more common in the fall. Known 



to breed on Mt. Tom and has bred on Sugarloaf . Nest on 



rocky ledges, sometimes of sticks and rubbish, but often the 



eggs are laid on the bare rock. Eggs 2-4, creamy- white or 



pale reddish, heavily marked with brown. Eggs laid in April. 



Feeds chiefly on birds and is doubtless injurious. 



55. Falco colutnbarius (Linn.). 



PIGEON HAWK. 



Above,brown(blai3h penciled with'blaok in full plumaged male) ;beneath, 

 white tinged with tawny, streaked with dark brown. Length, 12 inches. 



Rare and irregular visitor, probably only during the migra- 

 tions, though it has been reported in winter. 



