May 4, 1922. 
MEMORANDUM FOB DR. HELSOK. 
Dear Dr. Nelson: 
lists of the breeding birds of laysan Island and the other 
bird islands of the Hawaiian Islands Reservation are given on the 
following pages. Of these species Pterodroma hypoleuca breeds in 
January; the two Albatrosses and Oceanodroma tristrami in February 
and March; Sterna fuscata and Porzanula palmeri in May and June; 
Hlmat ione fralthii . Teles-pyza cantans . and Tatars famlliaris , chiefly 
in May; and the remaining species from March to July. The height of 
the breeding season for most of the species on laysan Island is the 
month of May. 
Very truly yours. 
Assistant Biologist. 
s 
