English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Niceforo\u27s Wren (Thryothorus nicefori) is a critically endangered songbird endemic to dry forests of the Chicamocha Valley in central Colombia. Discovered in 1946 and \u22red-listed\u22 by the IUCN since 1988, Niceforo\u27s Wren faces a threat of extinction because of its limited habitat range and increasing deforestation for agriculture and livestock. This species has been poorly studied, and its vocal behavior is yet undescribed. We provide the first description of the vocalizations of Niceforo\u27s Wren, based on analyses of recordings from 29 individuals (more than half of all estimated living individuals of this species). We examined the fine structure of their songs, the pattern of solo and duet singing behavior, and the song repertoire size of males and females. Both sexes produce solo songs, coordinated vocal duets, and a variety of calls. Songs have a stereotyped syntax including one or more introductory syllables, a trill of rapidly repeated syllables, and a frequency-modulated terminal syllable. Males have a repertoire of at least 12-21 different song types, whereas females have a repertoire of at least 7-9. Both sexes sing solo songs with eventual variety. Male songs are more complex and have lower frequency characteristics, whereas female songs are shorter, with fewer syllable types and fewer syllable repeats. Duets involve mated pairs singing in a coordinated fashion using the same song types from their solo repertoires. Duets typically begin with a male song followed by a female song and show variable levels of complexity involving one to two songs given by each individual. Our results provide a foundation for monitoring Niceforo\u27s Wrens and facilitating conservation of this critically endangered species. © The American Ornithologists\u27 Union, 2008

VOCAL BEHAVIOR OF THE CRITICALLY ENDANGERED NICEFORO'S WREN (THRYOTHORUS NICEFORI)