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GADOW AND GARDINER—AVES. 109 
27. Gygis candida. White Noddy. 
This bird ranges over the whole western part of the Indian Ocean. We found it 
breeding on the shores of Petite Coquillage, Peros Banhos, in June, and on those of 
Cargados Carajos in August. In Diego Garcia, Chagos, and in Coetivy it is a tree- 
breeder. 
28. Anous lewcocapillus=tenuirostris. White-headed Noddy. 
29. Anous stolidus. Noddy. 
These two species of noddies were found all over the western half of the Indian Ocean 
which we visited, breeding everywhere from May to November. They breed indifferently 
on the ground or in trees, commonly selecting the bases of the coconut-leaves. The 
two species never seem to occupy the same breeding-habitat in any island or locality. 
Thus on Petite Coquillage, Peros Banhos, in June, though it is evidently not the season 
of the large “Fair,” a few J. stolidus were found breeding on the ground and some 
A. leucocapillus in the trees. The latter bird, with Sterna fuliginosa, is the chief guano- 
former of Cargados Carajos; as the ground is occupied, it lays its single eggs on the tops 
of the low bushes, which are all matted together by Cussytha filiformis (liane sans 
feuilles ’’). 
A. stolidus was not found by us in the Maldives in 1899-1900. 
30. Bubuleus ibis. Egret. 
A single specimen from Cargados Carajos, seen also in Mauritius. It is an African 
species, replacing the Indian B. coromandus in this region. 
31. Butorides atricapilla. Little Green Heron. 
This heron was seen in every group of islands which we visited. It feeds along the 
shore, darting off into the densest bush when disturbed. It is particularly common on 
the islands where terns breed, feeding on their eggs. Young birds were seen in June on 
Petite Coquillage, Peros Banhos. The four specimens brought home from the Chagos 
all belong to the above species. 
32. *Ardea cinerea. Common Grey Heron. 
This bird was only found on the southern islands of Providence reef, where considerable 
numbers were breeding at the end of September in the low Scevola and Tournefortia 
bushes. 
33. Puffinus tenuirostris. 
This bird was found breeding in large numbers on several islands of 8. Joseph Atoll, 
Amirante Group, in October 1905. It is very similar in its breeding-habits to 
P. persicus (Fauna and Geog. of the Mald. and Lace. Archip. vol. i. p. 369), breeding 
under the coconut-trees in Cardiosoma-holes, but forming its own burrows in the more 
open sandy islands of the reefs. 
34. Sula piscator. Red-legged Booby. 
Immense numbers of these birds were found around S. Pierre Island, near Providence 
SECOND SERIES.—ZOOLOGY, VOL. XII. 16 
