Papers

Papers

BTO publishes peer-reviewed papers in a wide range of scientific journals, both independently and with our partners. If you are unable to access a scientific paper by a BTO author, please contact us.

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Fast trills in songs of a small passerine are not reliable signals of individuals’ age or predictors of mating success

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Published: 2025

Soft trills in Tree Pipit songs were suggested to indicate male quality to females. This study found soft trill rates and regularity, but not duration, improve with the age of males, but this improvement is too low to make soft trills a reliable age or quality signal. Correspondingly, paired and unpaired males did not differ in trill characteristics.

03.11.25

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Genomic architecture of egg mimicry and its consequences for speciation in parasitic cuckoos

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Published: 2025

Cuckoos are brood parasites, meaning they lay their eggs in other species' nests, and the resulting chicks are raised by the host species. Cuckoos therefore face strong evolutionary pressure for their eggs and offspring to match those of their hosts, yet each Cuckoo species parasitises multiple hosts. This study examines the genetic basis of egg coloration in the Common Cuckoo and the Oriental Cuckoo.

30.10.25

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