<P 0 
C. G. Loran Statical, Sand Island, Johnston Island Atoll 
Revised bird population estimates are given on the accompanying 
DATA. SHEET. 
Ken Wilz observed the Frigates again after repairing the 
"blind" which had fallen apart after Saturday's rain. 
After lunch we cut the leg markers in preparation for banding 
tonight. Several were tried on Sooty Tersn, Wedgtails, and 
Red -tailed Tropicbirds so as to get the correct fit. They appeared 
to fit fine and one can see the markers quite well at a distance. 
Five to six hundred markers for Sooty Terns were cut. 
After supper the Shearwater burrows were again checked. Pat 
Elliott also did some sketching. After dark (9 p«m. ) we began 
banding adult Sooty Terns and color marking them: (F and W band on 
right leg: color marker on the left). It was decided (after trial) 
to place the marker on the left). It was decided (after trial) 
to place the marker on the femur to keep it from dragging when the 
terns walked. Me worked in pairs: one catching and the other 
banding and marking. The time spent was tripled compared to just 
banding. It took Pat and I three hours to band and work two 
hundred terns where it normally takes only one hour to do two 
hundred. In all we banded and marked four hundred adult Sooty Terns 
before quiting a little after twelve midnight . 
July 23, 19^3 
This morning the weather is quite different than usual — it is 
overcast and appears it will rain. I worked over a Berlese 3aaple 
of beach sand and found an interesting acarine which I had never 
