THE BIRD BOOK 



26. Ckaveri's Murkelet. 



Brachyra mpli us craveri. 

 Range. — Both coasts of Lower California, breed- 

 ing cliiefly on the Gulf side. Craveri Murrelet is 

 very similar to the last except that the under sur- 

 faces of the wings are dusky. Breeds on the is- 

 lands near Cape St. Lucas, burrowing in the 

 ground as do most of the others of this species. 

 They lay a single egg, the ground color of which 

 is buff; tliey are quite heavily blotched with 

 brownish. Size 2M x 1.40. 



27. Black Guille.mot. Cepphus gryllc. 



Range. — Coasts and islands of the North At- 

 lantic, breeding from Maine northward to south- 

 ern Greenland. Guillemots are larger birds than 

 the Murrelets (length 1:3 inches) and their plum- 

 age is entirely different. This species in summer 



tluisli whitt 



CPtK. 



Xantus Murrelet 



Mandt's Guillemot 



is entirely black except the wing coverts which 

 are white. The bases of the greater coverts, 

 however, are black, this generally breaking the 

 white mirror as it is called. The under sur- 

 faces of the wings are white. Legs red. These 

 birds breed abundantly on the rocky islands 

 and high cliffs along the coast. Soon after 

 the first of June the eggs are laid in the crev- 

 ices of the rocks and sometimes upon the bare 

 ledges. Two or three eggs make the set. The 

 ground color is a pale bluish or greenish white 

 and the markings are various shades of brown 

 and black. Size 2.40 x 1.60. Data.— Grand 

 Manan, June 15, 1896. Two eggs laid in a 

 cavity back of large boulder. No nest. Collec- 

 tor, D. H. Eaton. 



Black Guillemot 



28 



