Rock Sparrow Couple (IMAGE)

Max-Planck-Gesellschaft

Rock Sparrow Couple

Caption

Hopefully, these two have no problems with infidelity: A rock sparrow couple enjoying their nestbox home. Researchers have now found out that males whose female companion plays away from home sing louder: Probably in a desperate attempt to tighten the pair bond to the unfaithful partner with particularly impressive sound volume.

Credit

Henrik Brumm/MPI for Ornithology

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