The Pacific Nighthawk 
girl; now he races to and fro in a frenzy; and now he glides along smoothly 
with the ease and stateliness of a gondola. He is a more dignified bat, 
graceful at times, but always a bit uncanny. But the “bull-bat” knows 
exactly what he is about, and he is playing the air game for the maximum 
of gastronomic profit. 
EGGS OF PACIFIC NIGHTHAWK, IN SITU 
With a mouth like the opening of a butterfly net, and a stomach 
to match, this winged bug-hunter is one of the world’s most successful 
entomologists. Everything with a pinched-in w r aist is grist to his mill- 
chinch bugs, squash-bugs, June-bugs, any old bugs. One Nighthawk 
stomach under examination gave up seventeen species of beetles at one 
time. Another, nineteen entire grasshoppers. Another, parts of thirty- 
eight. But if the bull-bat has a specialty, it is flying ants. Dr. Grinnell 
took a stomach which held 43 of our large-winged white ants (and of these 
some were still alive fifteen hours after capture); while Professor Beal took 
one individual whose crop was gorged with 1800 of a small variety. 
Nighthawks are not so strictly nocturnal as are the Poor-wills, for 
they put a quite liberal construction on the word “twilight,” and are 
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