Preliminary At-Sea Survey 
February-Maroh and April 1966 
Survey No. 28 
This report summarizes observations made by Robert DeLong, Paul Woodward, and 
Richard Maze between Oahu and S.I. Grid No. 1 during periods 26 February to 1 March 
and 8 through 9 April 1966. Watches, totaling 97*5 hours (40.2 in Fobruary-March 
and 47.3 in April), were held daily from sunrise to sunset. During this time 830 
miles were taveled—-375 in February-Maroh and 455 in April. 
Generally favorable weather prevailed throughout both periods, 
' y, • 
During February-March 451 birds of 11 species were soon* A total of 1041 
birds of 22 species was : recorded in April* Terns comprised 637# of the February- 
Maroh total while they were only 37% of the April total* Shearwater-Petrels, ac¬ 
counted for 52*1* of the April total and only 26% in February-Maroh* All groups 
showed an increase during the period* 
Migrating Sooty Shearwaters accounted for most of the increase in the 
numbers between the two periods* Wedge-tailed Shearwaters were seen for the 
i 
first time in April. Unusual birds included a Long-tailed Jaeger, A Mottled 
Petrel, two phalaropes (possibly Red Phalaropes), and two possible Pink-footed 
Shearwaters* 
No birds, were collected* 
* 
