Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
(491)
reminder that this was his final word about the business.
This completes the 17th. day of incubation. If we accept the
view that the missing egg was disposed of because it was no good, then
it is probable that it was the first egg laid. It was due to hatch, tha
then, day before yesterday, the 28th. This would make the incubating
period for all the eggs 15 days. This, of course, is speculation.
1 P.M. Late in the forenoon there was an almost torrential rain for
perhaps a half hour. At about 11:30 I returned to find Brownie on
the nest looking pretty well soaked on top. I gave him a worm which
he ate himself. A few minutes afterwards I gave him another, which
he gave directly to one of the nestlings. I could see it plainly.
I roof the nest. I spent about an hour arranging a sort of roof over the nest
consisting of a a sheet of about 14 mesh screen glazed with cellulose
acetate. This should keep the rain off. Brownie bore very well all
clipping and other disturbance; in his immediate vicinity, and towards
the end of the operation, Greenie came with a small white grub which
she fed to one of the chicks. Both adults then stood on the edge of
and removed leaves which had fallen into the
the nest, and gazed at their offspring. The young were dry, but the
nest parents looked pretty uncomfortable. Greenie took charge and endured
the remainder of the roofing job patiently. When B returned, he had
some more of the small grubs, to which he added two meal worms
contributed by me. These he fed to both young birds. This I saw
plainly, owing to changes in the surrounding foliage made necessary
in order to place the roof. This is not feeding by regurgitation;
the food was brought to the nest in the bills of the parents and not
in their crops. After seeing young fed in four thrasher nests (no
eggs hatched in the first one) I have yet to see the first regurgi-
at the nest.
tative movement on the part of a thrasher. It will be noted that
is over
neither nesting 29 hours from the egg, and that one of them is
approximately 5 hours old. (That is, if it was born 24 hours after
the first one) They have already begun the scarcely audible "fairy
Incubation
period is
15 (?) days.
Torrential
rain.
B in nest
gets wet.
He gives a
meal-worm to
nestling.
I roof the nest.
B bears up
well.
G feeds a
grub.
Both remove
leaves and
are wet.
Young are dry
G shows
courage.
No regurgi-
tative feeding.
All feeding
is "raw".
Fairy chorus
begins.