192 CALIFORNIA ACADEMY OF SCIENCES  [Proc. 4TH Ser. 
as zealous, however, in the defense as were the two owners. 
They were fearless, allowing us to come very close to them. 
The nest contained two young with downy heads and fairly 
well-feathered bodies. They were in the nest and were not ob- 
served to sit up. 
An adult, taken on Hood on July 2, had large sexual 
organs. 
Like most of the native birds, the hawks lacked the fear 
of man. ‘They were very inquisitive, alighting close to and 
even following a person. At times, however, dusky- 
plumaged birds appeared a bit wary. When we were en- 
camped three or four hawks, sometimes more, frequently 
stayed around camp all day. On northwestern Indefatigable, 
while collecting along the coast, several followed me, alight- 
ing around me, often within four or five feet, every time I 
stopped. 
Twice we saw Galapagos Hawks in company with 
Man-o’-war Birds, circling high in the air. They were 
usually seen, though, only with birds of their own kind. 
Frequently at sundown there would be three or four roosting 
in the trees about our camp. They also roosted in cactuses, 
on the rocks along the sea coast, and on telephone poles. 
The hawks killed were in good health and were frequently 
very fat. They put up a game fight when wounded, getting 
on the back if hard pressed and bringing the talons into play. 
In food habits, Galapagos Hawks fill the offices of birds 
of prey and of scavengers, and seem to draw the line at no 
animal matter dead or alive. Any of their own species, 
killed or seriously wounded, they fell on with avidity, dis- 
posing of them in short order. On one occasion we killed 
two and left them on a beach; in a short time 17 of their 
fellows congregated and devoured them. A list of the 
animal remains which we found in specimens of this hawk, 
or which we saw them eating, gives some idea of the variety 
of their diet: Crabs, centipedes, grasshoppers, finches, lizards, 
fat torn from seal and pig skins staked out to dry, tortoise, 
iguana, and goat remains, young Swallow-tailed Gulls, and 
the putrid remains of an adult Blue-footed Booby. We found 
the carcass of the booby in the nest of a pair of hawks on 
South Seymour. Their craws were crammed with its rotten 
flesh. 
