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]
Douglas Von Gausig (recordist; copyright holder), Naturesongs.com
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