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Previously unknown behavior in parasitic cuckoo females:male-like vocalization during migratory activity

Avian Research 2021年第1期12卷 1-16页

作者： Swetlana G.Meshcheryagina Alexey Opaev Institute of Plant and Animal Ecology Ural Branch of the Russian Academy of SciencesEkaterinburgRussia A.N.Severtsov Institute of Ecology and Evolution Russian Academy of SciencesMoscowRussia

Background:In the last decade,enigmatic male-like cuckoo calls have been reported several times in East *** calls exhibited a combination of vocal traits of both Oriental Cuckoo(cuculus optatus)and Common Cuckoo(cuculus canorus)advertising calls,and some authors therefore suggested that the enigmatic calls were produced by either Common×Oriental Cuckoo male hybrids or Common Cuckoo males having a gene ***,the exact identity of calling birds are still ***:We recorded previously unknown male-like calls from three captive Oriental Cuckoo females,and compared these calls with enigmatic vocalizations recorded in the wild as well as with advertising vocalizations of Common and Oriental Cuckoo *** achieve this,we measured calls ***,we video-recorded captive female emitting male-like calls,and compared these recordings with the YouTube recordings of calling males of both Common and Oriental Cuckoos to get insight into the mechanism of call ***:The analysis showed that female male-like calls recorded in captivity were similar to enigmatic calls recorded in the ***,Oriental Cuckoo females might produce the latter *** features of these female calls appeared to be unusual among ***,females produced male-like calls at the time of spring and autumn migratory activity and on migration in the *** of this,functional significance of this call remained ***,the male-like female call unexpectedly combined features of both closed-mouth(closed beak and simultaneous inflation of the‘throat sac')and open-mouth(prominent harmonic spectrum and the maximum neck extension observed at the beginning of a sound)vocal ***:The cuculus vocalizations outside the reproductive season remain poorly ***,we found for the first time that Oriental Cuckoo females can produce male-like calls in that *** of its rarity,this call might be an ***,fe

关键词： Closed-mouth vocal behavior Cuckoo call cuculus optatus Female song Male-like vocalization

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