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Bay Wrens (Thryothorus nigricapillus) occupy the same niche on the Carribrean slope as the Riverside Wren occupies in the South Pacific slope - dense river and stream galleries. They have, in fact, at times been considered just subspecies. They are a good example of allopatric evolution. Both are wonderful, loud singers. (Costa Rica) [Editor's note: This is almost certainly a duet -- CSP]
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Bay Wren (Thryothorus nigricapillus)
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Bay Wren (Thryothorus nigricapillus) [Editor's note: This is almost certainly a duet -- CSP]
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Bay Wren (Thryothorus nigricapillus) scolding calls
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A Rufous and White Wren (Thryothorus rufalbus) sings in the dawn chorus at Monteverde (Costa Rica), near "Cabinas el Bosque", 6/16/99. The song was repeated verbatim at 6-10-second intervals for several minutes.
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Here is an example of a Rufous and White Wren (Thryothorus rufalbus) song. This and two other songs were recorded within a few hundred meters and within a two-hour period. Notice that, although the songs are all different, they share common structure - a lead-in note or phrase, followed by a variable-speed trill and ending with an upturned punctuation note.
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Here is an example of a Rufous and White Wren (Thryothorus rufalbus) song. This and two other songs were recorded within a few hundred meters and within a two-hour period. Notice that, although the songs are all different, they share common structure - a lead-in note or phrase, followed by a variable-speed trill and ending with an upturned punctuation note.
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Here is an example of a Rufous and White Wren (Thryothorus rufalbus) song. Now, just to show that no bird follows any rule I create, here are two examples of this species' song from deep in the forest at Manuel Antonio - morning of 6/15/98.
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This Rufous-breasted Wren (Thryothorus rutilus) sang this exact phrase evey 6 seconds for hundreds of repetitions in the forest surrounding "Cabinas el Bosque" in Monteverde (Costa Rica), 6/17/99.
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Riverside Wrens (Thryothorus semibadius) love the underbrush. The area around Manuel Antonio (Costa Rica) is full of Riverside Wrens. They have several distinct songs, most of which are strident and loud. Riverside Wrens, like House Wrens, are masters of "theme and variations" singing - it seems each individual comes up with his own song, which fits snugly within their basic theme. Funny how such an inconspicuous bird can be so conspicuous. This call I refer to as the excited "stream" of calling. [Editor's note: This is almost certainly a duet -- CSP]
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Riverside Wrens (Thryothorus semibadius). If this bird has a "normal" song this is it. [Editor's note: This is almost certainly a duet -- CSP]
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Riverside Wrens (Thryothorus semibadius). Here are a few calls, given from the deep underbrush, where the Riverside Wren is so comfortable - Manuel Antonio's surf in the background.
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Riverside Wren (Thryothorus semibadius) Here is an example of a variation on the theme. [Editor's note: This is almost certainly a duet -- CSP]
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Riverside Wren (Thryothorus semibadius) Here is an example of a variation on the theme.
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Riverside Wrens (Thryothorus semibadius).This call came from the underbrush at Manuel Antonio (Black-hooded Antshrike in the distance).
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Riverside Wrens (Thryothorus semibadius). Here is one of their warning calls - issued to us at Carara, 11/98.
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Stripe-breasted Wrens (Thryothorus thoracicus) are common residents of the Carribbean slope (Costa Rica). They have two dominant "song types". This is their monotonous (literally!) song - delivered from the underbrush in the mountains above Braulio Carrillo.
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Stripe-breasted Wrens (Thryothorus thoracicus). Here is an example of his more "song-like" song - sounds a bit like a Carolina Wren, doesn't it? This one was recorded near Arenal Lodge, at the foot of Volcan Arenal, 6/15/99.
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Stripe-breasted Wren (Thryothorus thoracicus). Here is their typical warning call, at La Selva, 6/19/99.
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Stripe-breasted Wrens (Thryothorus thoracicus). They have two dominant "song types".Here is example of that song type from Guayabo. Note that the birds at Guayabo often vary the pitch of this song slightly during its rendition.
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Stripe-breasted Wren (Thryothorus thoracicus). Here is an example of his more "song-like" song - sounds a bit like a Carolina Wren, doesn't it? This one was recorded at Guayabo Nat'l Park, 6/25/99.
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Stripe-breasted Wrens (Thryothorus thoracicus). Here is an example of his more "song-like" song - sounds a bit like a Carolina Wren, doesn't it? This one was recorded at Guayabo Nat'l Park, 6/25/99.
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Stripe-breasted Wrens (Thryothorus thoracicus).If a pair really get excited, they may sound like this, recorded at Guayabo Nat'l Park, 6/25/99.
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Parents' reaction to our presence in the area!