Species group · Birds
WAnimals has 2 species of wren, spread across 2 families (Bernieridae, Troglodytidae).
Ranges calculated from the profiles that record the figure, not from all 2.
Each one has its own full profile. This group does not replace them: it brings them together.
No species documented in this group is genuinely at risk according to the IUCN, with the data available today.
Recorded in 50 countries. The ones with the most species in the group:
For all its tiny size, it has one of the loudest songs relative to body weight of any European bird.
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It is polygamous: the male may mate with several females, which is why clutch size varies so much from one nest to another.
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It is the only representative of its family in the Old World; the other wrens, as many as 93 species, are American.
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Its family is a recent discovery: well into the twenty-first century its species were still scattered among the bulbuls, warblers and other families, and only genetics revealed that they form a group of their own, confined to Madagascar and descended from a single colonisation.
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It is an example of island adaptive radiation: from a common ancestor, the species of that family today occupy niches as different as the understorey, the canopy and the tree trunks, with very different bills.
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It is a regular member of the mixed flocks of the Malagasy forest, in which several species travel together and benefit from the collective watch.
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