-4- 
Pterodroma sp. 
Strong winds and rough seas made specific identification of this 
genus difficult. Birds definitely identified were 10 P*. externa ( two 
identified as Juan Fernandez Petrel) and 3 £* h ypoleuca (one identified 
as a Black-winged Petrel). Another 22 birds were identified only to 
the Genus Ptero droma : these probably belong to hypoleuca and 
P. externa groups. Few, if any, of the unidentified Pter odroma are 
believed to be Mottled Petrels, because in high winds the flight pattern 
of this bird is usually distinctive. 
The group showed an increase of 175$ over the last month. This 
build-up will continue until the high densities of mid-summer are 
reached. 
Leach 1 s Storm Petrel 
Four birds, probably of this species, were seen this month 
compared with two seen last month. 
Red-t ailed Tropicbird 
Three birds of this species were recorded. This is the same 
number as was seen in the grid last month. 
B lue-faced Booby 
I 
FouTvjB lue—faced Boobies,an increase of 300$ from last month, were 
seen. 
Brown Booby 
• - 
% 
On the evening of the 5th while over 200 miles from Johnston 
Island an adult female landed on the ship. It was chased off by 
