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Transcription
R.Grossin
1768
Great Frigatebird
14 oct. 68. Storm, we were hovering in the concentric
resting area, on the SW side of nesting
at 23.30. Many adults were present too,
but these started to fly as I was about
through with the immature count.
15 oct. At 0930 there were 51 immatures
in the above plot (Plus 8 at 9 and
5 ad 8 or nests). Thus 17, or 25%
of the birds in this particular group
were leaving the island to feed and
were probably independent of parents.
24 oct. An immature flew our campsite, gaily
a half-year old, only term, fled off with its
father sometime saw there and succeeded
in pelting it. The chick of the next one
in mid-air. Then after a while the
record we landed and after about 15
minute I attempting to swallow the
chick, finally succeeded. For many
minutes. By doing so, the soft term
chick pestered out of the frigate mouth.
The guys there in camps have
mated many seasons. When the frigate
(Descendants, Breeder as they are the Common
as stock camp) have yielded my soft,
tens and dropped them from some
height either our land or out over
the water.
Next count made today between
1600 - 1800. At this time the birds
which go out to sea are not back yet
and permanent birds in a pretty
settled manner of count went
as follows: All those which could
fly off or fly when disturbed were
considered juveniles. Any feathered
young were those which for all
practical purposes had no down
but were reluctant to move.
R.Grossin
1768
Great Frigatebird
Other Island
Note: Young were there that had considerably
grown on the back region, but were
otherwise quite feathered, rest are
self-applying. One egg was laid;
chicks just hatched.
Eggs: 2
Naked Chick 1
Sdy 14
Mdy 13
Ldy 72
LFy 168
Juv. 247
577
The sample plot SE D camp is
of Hall type, slightly 25% of the few
birds noted to leave the island in the
eastern, then the number of juveniles
for the whole would be ca. 369 birds.
I shall test a few more compact groups
before deciding what I am leaving the
island.
A naked chick, a small downy
was found in no nest.
24 oct. Collected larv samples from 10 large
frigate young as follows:
① 72.4 100% Scobirds,
② 77.3 30% Squid, 70% Scobirds
③ 45.3 70% Squid, 30% Scobirds
④ 91.5 100% Squid
⑤ 42.6 20% Squid, 80% Scobirds
⑥ 59.4 100% Squid
⑦ 47.0 100% Squid
⑧ 31.7 100% Squid
⑨ 65.8 30% Squid, 70% Scobirds
⑩ 54.2 100% Squid.
589.7