Johnston, David W., 1964
Page 4
Image from the Biodiversity Heritage Library. Contributed by Smithsonian Institution Archives. | www.biodiversitylibrary.org
Transcription
Johnston, D. W. 1964 Wake Island birds didn't fly too readily in the dark, but I doubt that we banded any- where near 1/100 of the birds in the colony. Happily, there were 9 banded birds in the trench--all banded last year as adults in June or July on this island. his would suggest that some of the terns are on nearly a 10 month cycle. Although one might literally be surrounded by terns all over the ground, as soon as you started picking them up to be banded, in spite of the deafening roars, somehow or other the nearby birds on the ground would gradually leave until, after banding 2-3 birds, there might then be none in reach. I just wonder if they didn't utter a particular alarm note when being caught, thus tending to frighten many of the others away. Certainly the easiest to catch were the incubating adults, then their presumed nearby mates. I'm simple dumbfounded by the fact that all incubating adults that we've handled had 2 incubation patches, and yet only very rarely do the birds here lay more than one egg. It is not unthinkable that under some conditions--perhaps late nesting, a poor season, etc. -- they could and do lay 2 eggs more frequently. As on a previous visit we saw feral house cat at the edge of the colony. Found a pile of several tern wings. This is likely the only serious predator of the terns, since there is an active rat control program on Wake. Noted an interesting symbiotic relationship between Brown Booby nests and hermit crabs. The crabs, large and reddish, gathered in numbers from 1-5 at the edge of the nests and consumed all or parts of the fish that the boobies disgorged. Evidently the boobies will disgorge fish even when not being frightened by men because on at least 1 occasion we found a 1 ft. fish [illegible] consumed by the crabs. 14 Apr Flipper Point, Peale Is., Wake Is. #1830. Sterna fuscata. ad ?, fol. to 2 mm, oviduct somewhat enlarged.