Blue-gray Noddy ( Procelsterna cerulea ) 
Current st at us : Breeds annually 
Prior Records ; Munro (19^-1) noted this species on Nihoa on May 26-27, 1891. 
Other records are Fisher ( 1906 ), Munter (19&5)> Wetmore ( 1923 ), Vanderbilt 
and de Schauensee (I 9 W.), Woodside and Kramer ( 1961 ), Kramer (1961), Kramer 
and Beardsley ( 1962 ). 
Population : Fisher (op. cit) called this species common on his first visit 
June 1-2, 1902 and noted that they -were still abundant August 5-10, 1902. 
Wetmore (op. cit) estimated 800 pairs June 11-16, 1923. Vanderbilt and de 
Schauensee (op. cit) considered them to be "rather rare" August 7“ 15, 19^-0. 
Woodside and Kramer (op. cit) on March 2, 1961 and Kramer and Beardsley (op. 
cit) on June 10, 1962 reported them to be abundant. Kramer (op. cit) con¬ 
sidered them "not too common" December 10-15, 1961. 
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All P0BSP v - i«44 - e have recorded this species. The trips of June 5-6, 1963 
and March 0 , 1964 reported thousands present. The trip of March 24, 1964 
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estimated. 550 present and the visit ot£ September 23-24, 1964 estimated 150. 
Relatively low numbers are recorded for August, September and December. 
This may indicate an annual fluctuation in population levels with the lowest 
numbers present during the winter months. 
Reproduction : This species, on Nihoa, nests on cliff ledges and in small rock 
cavities. They generally nest lower on the cliffs than Fairy Terns and Qftean 
utilize the low cliffs bordering Adams Bay. 
Munter (Op. cit) found two nestlings March 18, 1915* Wetmore (op. cit) 
saw four eggs and nestlings to immatures June 11-16, 1923• Vanderbilt and 
de Schauensee (op. cit) reported them to be nesting August 7-15, 19^0 and 
Kramer and Beardsley(op. cit) reported breeding June 10, 1962 but neither 
indicated the stages of breeding. 
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The P0BSP t ri p of March 6, 1964 recorded eggs, nestlings and immature 
birds. The tapip-of March 24, 1964 estimated 250 nests, five percent with 
