14° THE CONDOR Vol. XXII 
exposure just eighteen minutes after entering the blind. Quickly changing 
plates I made another exposure, both with the diaphragm at f.11 and ee cur- 
tain set at 1/90th second. 
The young are fed by regurgitation and I now proceeded to watch this inter- 
esting performance through a corner of one of the photographic windows. What 
a remarkable sight it was to view the actions of the adult, all unconscious of my 
presence, at a distance of but five feet. The young, being of considerable size, 
scrambled up to the entrance, and several with heads protruding received the 
food which was pumped into their throats by this curious method possessed by 
numerous species of birds. During the 
course of regurgitation there was an 
extremely rapid motion of the head and 
wings, an action upon which this fune- 
tion undoubtedly depends. 
The female paid but little heed to 
the blind, but was rather alarmed at the 
‘“eye”’ oe the camera, appearing nerv- 
ous and watching it constantly while 
feeding the young, which process she 
accomplished in feverish haste and 
quickly departed. At 11:15 the male 
appeared, ‘‘drooping down’’. gradually 
from aloft, on the opposite side of the 
tree, peering cautiously around at the 
obstruction and watching the ‘‘eye’’ 
nervously; but he did not venture to 
feed, and flew off shortly after. This 
occurred again with the male at 11:45. 
At 11:48 the female returned, fly- 
ing direct to the cavity and exhibiting 
less fear than heretofore, permitting 
several exposures while feeding was in 
progress; after this she entered the cav- 
ity for the purpose of cleaning the nest, 
and, at the moment she reappeared with 
a large portion of excreta in her bill, I 
made another exposure in this position. 
At 12:10 the male returned to re- 
connoiter, flew away and was back ten 
minutes later, appearing anxious to feed 
Fig. 4. AN ATTEMPT WAS MADE TO the nestlings but in a highly nervous 
CATCH THE MALE IN THE ACT OF FEED- state and evidently susplclOueyiauaaa—a 
ING, WITH THE CAMERA SET AT HIGH -oree, It was not until the follemuaaa 
SPEED; BUT HE CEASED OPERATIONS ° 5 
JUST AS THE RELEASE WAS PRESSED. that I obtained a picture of the male, 
when, but a few minutes after I entered 
the blind, he arrived, alighted on top of the tree and at once commenced a down- 
ward dorms, peering cautiously to right and left, calling softly and frequent- 
ly tapping the bark. Presently I could see his tail, which came into the screen 
first; a few more seconds and the bird appeared opposite the entrance, afford- 
