December 11, 2023
New deep learning AI tool helps ecologists monitor rare birds through their songs
Dunlin spectrogram. Credit: Nicolas Lecomte

Researchers have developed a new deep learning AI tool that generates lifelike bird songs to train bird identification tools, helping ecologists to monitor rare species in the wild. The findings are presented in Methods in Ecology and Evolution.

Identifying common bird species through their song has never been easier, with numerous phone apps and software available to both ecologists and the public. But what if the identification software has never heard a particular bird before, or only has a small sample of recordings to reference? This is a problem facing ecologists and conservationists monitoring some of the world’s rarest birds.

To overcome this problem, researchers at the University of Moncton, Canada, have developed ECOGEN, a first of its kind deep learning tool, that can generate lifelike bird sounds to enhance the samples of underrepresented species. These can then be used to train audio identification tools used in ecological monitoring, which often have disproportionately more information on .

The researchers found that adding artificial bird song samples generated by ECOGEN to a bird song identifier improved the bird classification accuracy by 12% on average.

New deep learning AI tool helps ecologists monitor rare birds through their songs
Audiomoth acoustic monitoring box, used by ecologists to record wild animals. Credit: Nicolas Lecomte

Dr. Nicolas Lecomte, one of the lead researchers, said, “Due to significant global changes in , there is an urgent need for automated tools, such acoustic monitoring, to track shifts in biodiversity. However, the AI models used to identify species in acoustic monitoring lack comprehensive reference libraries.

“With ECOGEN, you can address this gap by creating new instances of bird sounds to support AI models. Essentially, for species with limited wild recordings, such as those that are rare, elusive, or sensitive, you can expand your sound library without further disrupting the animals or conducting additional fieldwork.”

The researchers say that creating synthetic in this way can contribute to the conservation of endangered bird species and also provide valuable insight into their vocalizations, behaviors and habitat preferences.

The ECOGEN tool has other potential applications. For instance, it could be used to help conserve extremely rare species, like the critically endangered regent honeyeaters, where are unable to learn their species’ songs because there aren’t enough adult birds to model them.

The tool could benefit other types of animal as well. Dr. Lecomte added, “While ECOGEN was developed for birds, we’re confident that it could be applied to mammals, fish (yes, they can produce sounds), insects and amphibians.”

New deep learning AI tool helps ecologists monitor rare birds through their songs
Long-tailed Jaeger. Credit: Nicolas Lecomte

As well as its versatility, a key advantage of the ECOGEN tool is its accessibility, due to it being and able to used on even basic computers.

ECOGEN works by converting real recordings of bird songs into spectrograms (visual representations of sounds) and then generating new AI images from these to increase the dataset for with few recordings. These spectrograms are then converted back into audio to train bird sound identifiers. In this study the researchers used a dataset of 23,784 wild bird recordings from around the world, covering 264 .

More information:
ECOGEN: Bird sounds generation using deep learning, Methods in Ecology and Evolution (2023). DOI: 10.1111/2041-210X.14239

New deep learning AI tool helps ecologists monitor rare birds through their songs (2023, November 15)
retrieved 15 November 2023

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.

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