The Albatross of Laysan 175 



pair may be found nesting with the white species, as a rule 

 they are found by themselves. 



The black-footed albatross is somewhat larger than the 

 white species, and when seen on the wing is instantly recog- 

 nized as being far superior as an aviator. Birds of this spe- 

 cies followed our ship all the way from the Hawaiian Islands 

 to San Francisco. They nest like the Laysan albatross, and 

 feed their young in the same manner. Likewise, they have a 

 dance, las does the white species, but in their case it is much' 

 more elaborate, and the figures are more slowly and gracefully 

 executed. Instead of lifting one wing they raise both, while 

 the notes uttered are much softer, and the whole performance 

 ends with a sound which seems to come from deep within the 

 bird's body and suggests the stroke of a bell under water. 

 Although they nest separately, black albatrosses are very 

 neighborly with the white species. We often saw them vis- 

 iting a white colony, and sometimes even trying to perform 

 with them. On such occasions, however, the rapid pace set 

 by the white bird was rather too much for his more delib- 

 erate cousin, and in each instance the affair ended disas- 

 trously. 



During the latter part of August, when the young alba- 

 trosses are strong enough to fly and to feed themselves, they 

 all leave the island and live on the sea until the return of the 

 nesting season. 



THE CEDAR WAXWING {BOMBYCILLA 

 CEDRORUM) DURING JULY AND 

 . AUGUST, 1916. 



BY KATHERINE C. POST. 



A. Introduction. 



This work was done at the University of Michigan Bio- 

 logical Station, Douglas Lake, Michigan, under the direction 

 of Dr. R. M. Strong. Mr. R. F. Hussey gave me the facts 

 regarding the building of the second nest and the dates for 

 laying the eggs. Misses R. M. Hall, S. M. Moiles and M. 



