POWDERMILL NATURE RESERVE
PICTORIAL HIGHLIGHTS
May 20-27, 2002
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Sunday, May 26, 2002: Today
we banded 100 or more birds for the eleventh time this spring. Our
catch today was again dominated by Cedar Waxwings
(28 banded) and Red-eyed Vireos
(19). Our heavy catch of these two species over the last few days
likely reflects, at least in part, the recent emergence of the 17-year
cicada at Powdermill. Countless
thousands of these red-eyed insects are present in the immediate
vicinity of many of our net lanes, and waxwings, vireos and many other
species of birds will feed voraciously on this all-you-can-eat bug buffet
well into June. As of today, most of the cicadas were still sitting
still on the vegetation where they have recently crawled up and shed their
nymphal skins, but soon they will begin swarming and they and their loud,
incessant droning chorus will fill the air.
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Perhaps the lure of cicadas also played a role
in the capture (finally!) of our first Scarlet
Tanagers of the spring (three total,
one of them being this feisty second year male).
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We also banded our first Yellow-billed
Cuckoo of the season today.
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The elusive YBCU
is much more often heard than seen (and only rarely successfully caught
in the small mesh mist nets that we use at Powdermill), but when it is
glimpsed from underneath, perched up high in a tree, its distinctive large
white tail spots serve to distinguish it from the similar Black-billed
Cuckoo.
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Also, when a cuckoo is seen slipping quickly past
you on the wing at this season, bright rufous wing feathers will identify
it as a Yellow-billed.
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Saturday, May 25, 2002:
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Tops among the 102 birds banded today were Cedar
Waxwing (35 banded) and Red-eyed
Vireo (10). We banded two new
species for the spring, a Spotted Sandpiper,
which
did not cooperate with the photographers, and an Eastern
Kingbird, which did (thanks to Brian Jones
for taking this nice photo and the cicada photo above).
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Friday, May 24, 2002:
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More evidence that we are in the midst this week
of the transition between spring migration and the nesting season--although
we are still banding late migrants like Yellow-bellied
Flycatcher and Wilson's,
Canada, and Mourning
warblers, we banded our second flighted hatching year songbird of the season,
a not-too-happy looking juvenile Carolina
Wren (actually, two of them).
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Thursday, May 23, 2002:
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Cedar Waxwings (17
banded) topped the banding list today. No new species were banded,
but we caught our first flighted hatching year songbirdof
the season, a juvenile Song Sparrow.
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Wednesday, May 22, 2002:
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Banding today was characterized by low capture
rate (16 birds/100 net-hours) but high species diversity (24 species),
considering the comparatively small number of birds banded (51).
Two new species were added to our spring banding list: Acadian
Flycatcher and American
Woodcock.
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The AMWO
captures were unusual in that we netted two of these crepuscular birds
(most active at dawn and dusk) during our lunch hour (a third bird flushed
up with these two but did not hit the net). When we got the
birds back to the lab for banding and processing, it was apparent that
they represented a young bird of the year (our first flighted hatching
year, or HY, bird to band this spring) and its mother (a second year, or
SY, female). The size difference between the adult and its three-quarters
grown young (which still had traces of natal down on its head; photo below)
was exaggerated by the fact that the young bird was a male (AMWO,
like many other shorebirds, have reversed sexual size dimorphism, with
males being smaller than females). The mother and her one banded
young were quickly returned to the spot where they were caught, so the
brood could be reunited.
Measurements for the two birds pictured
below (adult female on left, juvenal male on right) were as follows:
wing length (flattened), 139.5 millimeters (SY-F), 127.0 mm (HY-M); bill
length (exposed culmen), 70.5 mm (SY-F), 53.0 mm (HY-M); body mass, 186.7
grams (SY-F), 116.6 g (HY-M).

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Tuesday, May 21, 2002:
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No new species were banded today, but the day's
catch provided us with "photo ops" for nice comparisons between
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After second year male (left photos below ) and
second year male (right photos below) Baltimore
Oriole
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Gray-cheeked (top
photo) and Swainson's Thrush
(bottom photo)
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and Philadelphia
Vireo and Tennessee
Warbler
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