9 
Ring-billed ? Gull (Larus delay/a-fensis ) 
# Obs. = 1 
A sub&dult thought to be this species was recorded m Section 9• 
Arcoic Tern 
Bern s p. 
fr Ohs. = 1^ 
ff Obs. = 86 
Vortv-four Sterna sp. were seen in Section 1 on 13 September. Tne 
si’htings were groups of 3 to 17 birds heading strongly south. The^tnree 
birds collected were Arctic Terns and quite surely the majority oy ^ne 
Sterna were this species. Sterns sp. were recorded in the northeast 
, CL 1“ and then a large 200-mile gap was crossed (partly at nigh.j in 
which no Sterna were recorded. The U Arctics appeared fairly su ie y 
at the extreme northwest corner of the Grid. I suspect the yc-rna _ 
closest to the coast may have included or even been entirely Common 
Eeros, S. hirundo . 
Xantus Murrelet ( Sndomycnura hypoleuca ) 
# Obs. = 3 
All three birds were seen in the northeast areas. No other rticxds 
were seer* in the Grid. 
Mourning Dove ^ Zenaidura ■ j 
ff Obs. - 23 
An increasingly regular element of the Grid avifauna, birds showed 
a fairly clear cut distribution paralleling the his oance-to-d.ia-1^ 
which runs through the Grid roughly along the heading lU l ,2^o i). T~e 
n^f^nore limiting distance is about 2 ;, 0-300 miles. 
Brown-beaded Cowbird 
( Kolothrus ater ) 
# Obs. = 9 
Immature Cowbirds appear 
passerine. The distribution 
lugs were made in the four se 
The fact that this species is 
from learned species typical 
to be regularly tne commonest pelagic 
resembles that of Mourning Dove. No sight- 
ctions comprising the southwest corner. 
parasitic and thusly fairly independent; 
behavior, is worth some reflection. 
imtidona sp. 
Garbling Vireo 
Warbler sp. 
# Obs. = 1 (collected) 
$ Obs. = 1 
Obs. =1 
Vesper Sparrow 
Sparrow sp. 
Passerine sp, 
Obs. = 1 
# Obs. = 3 (2 collected) 
//■ Ob s. = 2 
Total 
9 
