106 
THE CONDOR 
Vol. XII 1 
occupied in their lov'e-making that they paid very little attention to us. Their 
cries deadened the cries of all the other birds and they kept it up all through the 
night. 
“In the waters close to the breeding ground large flocks were seen. When I 
first arrived, March 24, there were an immense number of birds. The males were 
constantly seen fluttering over the females on the ground, near their nests; but no 
eggs were laid until April 2. It seems they spend some time in courtship before 
settling down to their matrimonial duties. The female when in passion emits a 
peculiar squeaky sound as she coaxes the male by squatting down and going 
through the most ludicrous motions. I have also seen a pair holding on to each 
other’s bills, a kind of tug-of-war affair; then they would back away and go through 
a suggestion of a dance, but all the time talking to each other in low love tones. 
I'ig. .if). .\ FAMILY OF BREWSTER BOOBIES, BOTH PARENT BIRDS, AND ONE YOUNG 
ONE IN THE N.A.TAr. DOWN. THFI NEST IS IN A CREVICE NEAR THE TOP OF \ CLIFF 
The appearance of a Duck Hawk would send them all flying to sea. They would 
return however very quickly. 
“On the southern end of the island there was a colony of Brewster Boobies 
( S///a brcivsteri) . They were nesting in the cliffs and caves and in the openings 
among the rocks (see fig. 36). The nest was composed of a few sticks, in most in- 
stances whitened with guano, and on this one egg w^as laid. I never found a nest 
with two eggs. I found many nest»wfith one young. I also saw full growm young 
on the wing, which would indicate that they must begin to nest in January.” 
Mr. Brown also found breeding on this island the Blue-footed Booby {Suhi 
)ieboiixi), the Craveri Murrelet {^Brachyramphits cravcrii) and the Rock Wren 
{Salpinctcs obsoletiis obsolctus). 
