Hanna Pamuła, Maciej Kłaczyński, Wiesław Wszołek, Magdalena Remisiewicz
Ornis Polonica 2017, 58: 187–196
https://doi.org/10.12657/ornis.2017.3.3
Abstract: The aim of the paper is to introduce the readers to the issues of acoustic monitoring of nocturnal bird migration. The concept and preliminary results from such a monitoring on the Baltic Sea coast are presented. Problems and difficulties occurring in environmental long-term recordings, as changing weather conditions and environmental noises of different types are identified. Manual and automatic extraction of voices from recordings from one night are performed and compared. We have found that two tested automatic programs were a few times less efficient but four times less time-consuming than manual segmentation. The paper shows the need for developing methods of automatic analysis of calls of nocturnal migrants, which could become in the future the complementary method for birds migration research.
Keywords: acoustic signal processing, biodiversity monitoring, bird migration, nocturnal flight calls
