286 The N.Z. Journal of Science and Technology. [Jan. 
Phalacrocoracidae. 
Black Shag ( Phalacrocorax carbo ).—Occasionally seen. 
Pied Shag ( Hypoleucus carius). —Pied shags breed in colonies on the 
cliffs on the south side of the island. They build large untidy nests of sticks 
in forks of bare and exposed branches of pohutukawa-trees overhanging 
at the tops of the sea-cliffs. Both young and adult were seen sitting on the 
branches together. These birds always return to the nesting-sites in the 
evening. 
White-throated Shag ( Microcarbo melanoleucus). — This and the two 
preceding species are perhaps the three most aggressive of the New Zealand 
shags, and the only ones that habitually go inland and take fish in lakes 
and streams. Reischek has recorded the white-throated shag on Little 
Barrier Island.* 
Fio. 2.—Pied shags and nests. 
Procellariidae. 
Diving Petrel ( Pelecanoides urinatrix). 
Blue Petrel ( Halobaena caerulea). 
- Dove Petrel ( Pseudoprion turtur). —Found by Reischek breeding in 
burrows on Little Barrier Island.f 
Nelly (Macronectes giganteus). 
Black Petrel ( Procellaria parkinsoni). —The black petrel breeds in large 
numbers near the summit of Little Barrier Island. 
Cook’s Petrel ( Pterodromct Cooki ).—This bird breeds in great numbers in 
burrows on the hill-slopes. Judging from the remains of birds killed by 
cats, they were fully fledged by the end of February. What few cats there 
are on the island must account for a considerable number, as birds with their 
breasts and heads eaten were encountered in various parts of the bush. 
I was able to examine several dead birds, and found that all belong to this 
species. 
North Island Mutton-bird ( Pterodroma macroptera ).—This bird is common 
in]Hauraki Gulf and the Bay of Plenty, breeding on many of the islands, 
* Trans. N.Z. Inst., vol. 19, p. 183, 1887. 
t Buller, Birds of N.Z.. ed. 2, vol. 2, p. 210.. 1888. 
