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The male Scarlet Tanager perches below the forest canopy |
Many of the birds nesting at our nature preserve only reside
with us from 3 to 4 months out of the year. The rest of their lives are spent
in the tropical regions of Central and South America. While they are here with
us, in a way, they bring the tropics to us in the form of their colorful
plumage and exotic songs. Though many of these “neotropical” songbirds breed in
a variety habitat types, the forest, or forest edges are the most common places
to find them.
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The male Rose-breasted Grosbeak sings from a treetop on the forest edge |
At the nature preserve, our older forest is the most likely
place to see or hear these birds. The most well-known tropical looking birds
–the Scarlet Tanager, Rose-breasted Grosbeak and Baltimore Oriole are somewhat
easier to see at this point in the season, as most are involved in feeding
their young, which are now out of the nest. As you get close to them, they give
sharp alarm calls, and fortunately for the observer, defensive parents will
sometimes come in close to scold intruders.
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The male Baltimore Oriole perches on a Red Oak in one of the reforestation fields |
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A male Hooded Warbler protecting his nest area |
The Hooded Warbler nests in the brushy understory of our
open-canopy forest. The male of the
species truly does look like a refugee from the tropics with his bright yellow
body and black hood, which is interrupted by a bold yellow eye mask. His song
is a strongly whistled short phrase that sounds to some like: “ta-weet…ta-weet…ta-weety-o”.
This song varies little with different individuals, but the Hooded Warbler also
sings an alternate song which is not as well recognized and is harder to
translate into words.
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The female Hooded Warbler with an insect to bring back to the nest |
The Hooded Warbler most often breeds in small colonies where
there is a substantial amount of suitable habitat. We are fortunate to have one
such colony at our nature preserve.
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The male Hooded returns to the nest where hungry chicks await |
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After the young leave the nest, only one infertile egg remains |
As a nest site, the female chose a short Beech sapling that
was shrouded by blackberry brambles. Only by getting very low to the ground,
was I able to peer between the leaves and see what she was up to. That’s where
I saw her weaving together relatively wide strips of bark and long pieces of
grass. It really more resembled the nest of a Red-winged Blackbird than any
creation by a member of the warbler clan. When finished, the sturdy looking
nest looked like it would stand up well to any boisterous brood, and as things
turned out, it did.
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The male Mourning Warbler on the breeding grounds |
Another, mostly tropical species, the Mourning Warbler, has
almost exactly the same habitat requirements as the Hooded Warbler –nesting in the
understory of open-canopy forests. This is another Yellow bird, but this one
has a complete black hood over its head with no yellow eye mask. In male birds,
the hood is darkest at the point where it meets the bird’s breast.
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A female Mourning Warbler fluffs up her feathers and takes a sun bath |
The species is shy and retiring –that is unless you get
close to their active nest (most always hidden away in a low bramble), at that
point both parents come out to scold you with harsh “witch…witch..witch” calls.
It’s almost as if they are trying to accuse someone of practicing the dark arts.
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The not very tropical looking Ovenbird |
The song of the Mourning Warbler is a rapidly given phrase. It’s a series of 3 or 4 tight, almost gurgled trills, which are
terminated by a low note. The male Mourning Warbler can sometimes be heard to
give a rather extraordinary “flight song”. As is implied, the flight-song is
given on the wing as the bird ascends over his breeding grounds. This song is very
seldom heard –and there seems to be very little mention of it in the bird literature.
It sounds like a haphazard jumble of
notes with the Mourning Warbler’s typical song incorporated into the middle of
it. It can be compared to the evening flight song given by the Ovenbird
(another warbler of the forest) and that given by the Common Yellowthroat. The
latter species’ flight song is the most familiar to birders, since it is given
at all times of the day in forest clearings and brushy meadows.
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The male Common Yellowthroat or "Bandit Bird" |
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