Ornithology, Год журнала: 2023, Номер 141(2)
Опубликована: Дек. 19, 2023
Abstract Previous work has demonstrated that there is extensive variation in the songs of White-crowned Sparrow (Zonotrichia leucophrys) throughout species range, including between neighboring (and genetically distinct) subspecies Z. l. nuttalli and pugetensis. Using a machine learning approach to bioacoustic analysis, we demonstrate song correlated with year recording (representing cultural drift), geographic distance, climatic differences, but response subspecies- season-specific. Automated methods bird annotation can process large datasets more efficiently, allowing us examine 1,913 recordings across ~60 years. We utilize recently published artificial neural network automatically annotate vocalizations. By analyzing differences syllable usage composition, recapitulate known pattern where pugetensis have significantly different songs. Our results are consistent interpretation these caused by changes characteristics syllables repertoire. This supports hypothesis evolution vocalization behavior affected environment, addition population structure.
Язык: Английский