Enderbury Island 
Hawaiian Noddy Tern (Angus minutus) 
DRAFT -2, 
Birds 
20 
Current St at us : Common visitor nesting in very small numbers. Maximum 
POBSP estimates of population: 4,000 February, 1964; minimum POBSP 
population estimates: 500 in July 19 63 . 
Prior Records: ^ Donaggho (1952) found several nests in July 1938 in the 
j 
Cordia grove^at the south end of the island, one of which contained a 
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small chick n ■> \ 'O'^ c.>v vo 1 . 
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Population : The number of birds present was usually estimated at between 
500 and. 1500 (See Appendix A) by POBSP personnel, but about 4,000 were 
present in February I 965 . A large proportion of birds present on each 
visit are probably birds from other islands since the breeding population 
has only once exceeded five percent of the total population (six percent 
in November 1964) and on all other visits has been less than three percent. 
Annual Cycle : Better than 95 percent of all active nests have been found 
in the months of November and February which suggests that the Hawaiian 
Noddy has a winter breeding season on Enderbury similar to that found on 
Hull Island (POBSP field notes). Very few nests have been found on any 
visit. 
The interval between POBSP visits has been lengthy enough so that 
some nesting cycles may have been initiated and completed without our 
having been aware of them. As a result nest counts taken on POBSP trips 
may be misleading, in that they indicate a smaller number of nesting birds 
than actually nested. However, the number of old nests present in the 
colony is always small and we believe that there have been very few such 
undented nesting cycles. 
