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Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
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Transcription
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Myzomela cardinalis
Saipan Common throughout, including the lake area, wherever there
are large trees in open country or edges of forests. Also in
trees projecting above the general forest level. Uses high
and conspicuous perches such as dead l i b e branches. Calling
continually with high shrill whistles, of varying inflection.
Also found in lower levels and scrubby forest growth. Males
chase other species away from a feeding place - usually a
poinciana tree in blossom. "Song" is just a loud wheezy call,
a whistle. I don't know whether it actually is a song.
Tinian Only one seen in course of a month's activities on the
Island. This was collected. Giving typical calls from high
perch in top of tree on hillside, of a pandanus type forest.
Guam Relatively more common around cleared and habitated areas,
especially native villages. Probably on account of the planted
fruit trees, and planted coconut trees. They seem to prefer to
forage in the center of the coconut , where they probably
get nectar or eat the flower parts, or perhaps even insects.
However, I have not noted insects in stomachs. Very hard to
approach. Males especially seem to have sort of a circuit
around a selected series of widely separated palms. Often
a female with the male - she flies first, then he joins her at
the next tree. This bird is an isolationist. It has nothing
to do with any other species.
Zosterops conspicillata
Saipan Abundant in medium tracts of medium sized trees with
small leaves, particularly various kinds of mimosa, with
compound leaves and small leaflets. To lesser extent also in
Casuarina and the acacias. Such ideas of relative abundance
are subjective, however, because these birds are very
abundant throughout. They do not go much into actual marshes,
and they stay out of big trees with large leaves such as bread-
fruit. They feed almost entirely on large berries. However,
their actions seem to be typical of the kinglet-type of insect
hunting - in small twigs and leaf sprays. They hover in front
of leaf sprays, they make short flights after insects sometimes.
They are very agile and active, and appear to use the
"rapid-peering" technique. Often seen in a nuthatch-like
posture, with bill, body and tail in line. Always in flocks,
of about 25. Not as compact as bush-tit flock - more straggling.
But eventually, they catch up with each other. Keep in touch
by a variety of siskin-like plaintive high calls. No song
noted. A confusion chorus is heard when a kingfisher comes near.
They come readily to squeeking, and are very tame. The most
abundant species on Saipan.
Tinian More abundant than on Saipan, for the reason that Tinian
is flatter, more open, and has less forest, and more planted
acacia and casuarina. Flocks up to 50 individuals. Collected
even out in sugar cane fields, where foraging within a foot of
the ground. Nest seen in an acacia in April. Looked just like
a bush-tit's nest, apparently had a hole on the side near-
the top. But couldn't tell because about 12 ft up.