Journal R. Clapp Dec. 10 - Green Island, Kure Atoll, Hawaii - Pacific O. Spent the morning with Ken nailing down slats on the roof so that it would not blow off. On Sunday when we had a severe storm the wind against the north end of the shack had begun to pull loose the screws holding the roof on. The job took us until about noon to complete. While we were nailing the roof down we heard tropic birds calling. Over the area to the south there were six tropic birds in two groups of three Calling but not displaying. Frigates were in the air all day in good numbers In the afternoon Ken and I tried to resurrect the tower near the north point but found it too heavy for us. Following this we tried to complete the last of the succession study plots but found that the inordinate amount of measuring ran us out of time as it began to rain at quarter of five. While we were working on the study plot, we made an interesting behaviour observation on the Frigate bird and red-footed booby. The frigate-bird was flying overhead trailing about a five-foot strip of vegetation. The booby was chasing it, following every twist and turn of the frigates' flight. The chase lasted for about 15 minutes. The booby would gradually overtake the frigate-bird (both making poor progress against the wind) and reach down and nip at the trailing vegetation. The frigate-bird would then duck and dodge away, & the red-