MIGRANT GROUP LAND BIRDS 63 



147. LEAST TERN. 



Pearly-blue White . 



9. Bill, yellow, black-tipped ; glossy black cap ; tail, 

 forked ; feet, pale orange. 



Breeds in same localities as foregoing ; eggs, 1-3, laid on bare 

 sand or in slight depression. 



14§. STORMY PETREL: "MOTHER CAREY'S 

 CHICKENS." 



Blackish. 



8. Bill, black ; 7'innp^ white ; tail, forked. 



Breeds along N. E. coast ; rather common ; nest, in horizontal ex- 

 cavation in ground; ^g^^ single, white ; strictly maritime, coming to 

 land only to breed. 



There are three species of stormy petrels to be found, but almost or 

 quite indistinguishable at field-range ; the most abundant, Leach's, 

 has forked tail, the other two, square tails. 



MIGRANT GROUP. 



LAND BIRDS. 



Comprising those species that arrive from the south in 

 spring, linger a short time, go north to breed — in the north- 

 ern part of the States of Me., N. H., and Vt., and the Adi- 

 rondack region of N'. V. , or beyond — return in the same 

 manner in the fall, and winter beyond the southern boun- 

 dary ; the periods for this group within territory are ap- 

 proximately April I — June i and Sept. i — Nov. i. 



