Lehner, P. 1904 600 Oct. 18 - continued Sooty Terns have been congregating in the air over the open area behind camp about 3:00 P.M. and remain their circling and squawking until about 2 A.M. when they leave - this has been going on since we arrived - apparently this is pre-nesting behavior; shortly after dark I went out & attempting to collect some, but they were too high yet to be shot; at 3:50 I went skin-diving again in front of camp; this time I saw 2 small sharks, one of which sent George up into the air shouting Shark!; both were no larger than 4 ft. long - all sharks we have seen inside the reef have been Black-tipped sharks ( Carcharhinus melanopterus ) - they are numerous, but all small; some sharks we saw around and in the passage are another species - possibly Mako or White - up to 7 feet long; out of the water at 5:15 ; 6:00 George and I went back after rats - more successful ( see above ); 6:25 we returned to camp from rat expedition; 8:15 we all set out to band Boobies on Arumenii Island - using the whack 'em down method we managed to band (over)