Purpose of Crested Francolin<i>Ortygornis sephaena</i>male collective calls at dusk based on livestream audio censusing

Niekerk, Johann H van; Forcina, Antonio

doi:10.2989/00306525.2020.1827463

Cited by 1 publication

(1 citation statement)

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“…In the same study, calls of a duetting pair were recorded and immediately played back to the same birds, which repeatedly responded to their own calls. These observations suggest that D. s. sephaena reacts as actively to its own and neighbouring calls as to pre-recorded con-subspecifics calls from elsewhere (Van Niekerk & Forcina 2020). However, birds were less inclined to respond to hetero-subspecific calls, and for this reason the design of our playback experiments was intended to minimize habituation further through alternation of distinct recordings.…”

Section: Methodological Issuesmentioning

confidence: 95%

Call variation of Crested Francolin (Dendroperdix sephaena) across Africa defies the effects of spatial gradients

Niekerk

Megía‐Palma

Forcina

2021

Ibis

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The study of intraspecific geographical variation of non-passerine vocalizations remains under-studied, especially in African species. We explored spatial patterns in call variation of the Crested Francolin Dendroperdix sephaena across its wide sub-Saharan distribution in Africa. We extracted and compared 152 pair duets from 44 recordings encompassing four D. sephaena subspecies and, in the field, played back each subspecies' vocalizations to 15 D. s. sephaena and three D. s. zambesiae males to document their behaviour. We recorded strong responses to con-subspecific calls and weak responses to hetero-subspecific calls, especially towards D. s. grantii and D. s. rovuma. This indicates that intraspecific vocal variability in D. sephaena is not clinal but spatially discrete, and strictly reflects subspecies affiliation (albeit with more similar vocal features among geographically neighbouring subspecies). Vocal variation in D. sephaena may have evolved under palaeoclimatic events that fragmented its former range and promoted allopatric diversification before a re-expansion into partial sympatry.

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Section: Methodological Issuesmentioning

confidence: 95%