42 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 10/ 



DEMIGRETTA SACRA SACRA (Gmelin) 



Ardca sacra Gmelin, Syst. Nat., vol. i, pt. 2, 1789, p. 640. (Tahiti.) 



Guam Island : Gray phase, Ypao Point — 2 males, July 6, August 

 8; Oca Point — i juvenile female, May 11; Ylig Bay — -i female, 

 July 24 ; Facpi Point — 2 juvenile males, July 27 ; Agf ayan Bay — 3 

 females, June 6, July 8; Port Ajayan — 3 males, June 18, July 16; 

 Achang Bay — i juvenile male, 2 females, July 16, August 6, 2/ ; 

 no locality — i juvenile male, September. White phase, Agfayan 

 Bay — I male, June 6; Port Ajayan — i male, June 18. Mottled 

 immatures, Port Ajayan — i male, June 18; Achang Bay — 2 males, 

 July 16. Rota Island : Gray phase, Sosan Isthmus — i male, i female, 

 I juvenile male, October 18, November 2, 5. Ulithi Atoll : White 

 phase, Potangeras Island — i female, August 15. Palau Islands 

 (Peleliu Island) : Gray phase, Eastern Peninsula — i female, i juve- 

 nile male, September 10. White phase, Akarakoro Point — i female, 

 September 16. 



Of 29 reef herons collected in Micronesia, 21 were in gray phase, 

 4 in white phase and 4 were mottled juveniles. Field observations, 

 however, showed a ratio of about 6 grays to 4 whites, which agrees 

 with the findings of Mayr and Amadon (Amer. Mus. Novit., No. 

 1144, 1941, p. 8). Birds were seen as follows: Guam, about 6 grays 

 to 4 whites ; Rota, no white herons seen ; Ulithi, 4 grays, 6 whites, 

 I mottled ; Truk, i gray, 2 whites, i mottled ; Palau, equal numbers 

 of gray and white. No adult mottled herons were collected. 



Weights of four adult males from Guam (gray phase) are 590-667 

 (614), of two adult males from Guam (white phase) 600 and 662, 

 of five adult females from Guam and Rota (gray phase) 477-553 

 (506). Birds lacking ornamental plumes, and probably all juveniles, 

 were taken in the summer months. One specimen taken in June was 

 in molt and most of those birds collected later in the year were also in 

 molt. Stomachs examined contained fish and crabs. 



EGRETTA INTERMEDIA INTERMEDIA (Wagler) 



Ardca infcrjiicdia Wagi-ER, Isis, 1829, p. 659. (Java.) 



Guam Island: Piti — 2 males, June 13. Rota Island: Taruka — i 

 male, October 31. Ulithi Atoll: Potangeras Island — i female, 

 August 15. Palau Islands: Angaur Island — i male, i female, Sep- 

 tember 21. 



The egret has been reported as a winter visitor to Koror in the Palau 

 Islands (Handlist Japanese Birds, 3rd ed., 1942, p. 203). These 



