.activity cycles of the avifauna of Green island, Kure Atoll 
a. Observations 
1. Tiro observation towers have been constructed. One is a 
platform placed 60 feet up in a metal frame radar reflector 
giving a view of the southern half of the island; the second 
is a 10 foot wooden platform built on top of a 25 foot high 
dune giving a view of the northern half of the island. 
2. Platforms will be manned by one person with telescope or 
binoculars. Data will be collected in two shifts: from 
dawn to noon and noon to dusk; and several cf these watch 
periods will be conducted each week so that data is accu¬ 
mulated on activity at all times of day, in all types of 
weather, and in all seasons. 
3. Data recorded 
1. The watch will record at 10 minute intervals the species 
and numbers of each in the air at that time on the half 
of the island in which his tower is located, and make 
notes on the behavior of as many of these individuals as 
possible. 
2. The watch will count bii’ds in roosting colonies and attempt 
to determine the size and age structure of these colonies, 
and also record behavior in the roosting colonies. 
3. Activity information will be correlated with season, 
weather, and time of day to present a general picture of 
the activity cycles of the avifauna. 
