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1. Evolution and plasticity: Divergence of song discrimination is faster in birds with innate song than in song learners in Neotropical passerine birds: EVOLUTION OF SONG DISCRIMINATION IN NEOTROPICAL BIRDS

   https://doi.org/10.1111/evo.13311  

   Freeman, Benjamin G. ; Montgomery, Graham A. ; Schluter, Dolph ( September 2017 , Evolution)
2. Classifying Humpback Whale Calls to Song and Non-Song Vocalizations using Bag of Words Descriptor on Acoustic Data

   https://doi.org/10.1109/ICMLA.2019.00150  

   Mohebbi-Kalkhoran, Hamed ; Zhu, Chenyang ; Schinault, Matthew ; Ratilal, Purnima ( December 2019 , 2019 18th IEEE International Conference On Machine Learning And Applications (ICMLA))

   Humpback whale behavior, population distribution and structure can be inferred from long term underwater passive acoustic monitoring of their vocalizations. Here we develop automatic approaches for classifying humpback whale vocalizations into the two categories of song and non-song, employing machine learning techniques. The vocalization behavior of humpback whales was monitored over instantaneous vast areas of the Gulf of Maine using a large aperture coherent hydrophone array system via the passive ocean acoustic waveguide remote sensing technique over multiple diel cycles in Fall 2006. We use wavelet signal denoising and coherent array processing to enhance the signal-to-noise ratio. To build features vector for every time sequence of the beamformed signals, we employ Bag of Words approach to time-frequency features. Finally, we apply Support Vector Machine (SVM), Neural Networks, and Naive Bayes to classify the acoustic data and compare their performances. Best results are obtained using Mel Frequency Cepstrum Coefficient (MFCC) features and SVM which leads to 94% accuracy and 72.73% F1-score for humpback whale song versus non-song vocalization classification, showing effectiveness of the proposed approach for real-time classification at sea. 

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3. Effects of Song Experience and Song Quality on Immediate Early Gene Expression in Female Canaries ( Serinus canaria )

   https://doi.org/10.1002/dneu.22685  

   Haakenson, Chelsea M. ; Madison, Farrah N. ; Ball, Gregory F. ( May 2019 , Developmental Neurobiology)
4. Reproductive character displacement of female, but not male song discrimination in an avian hybrid zone: FEMALE SONG DISCRIMINATION IN SYMPATRY

   https://doi.org/10.1111/evo.13267  

   Wheatcroft, David ; Qvarnström, Anna ( July 2017 , Evolution)
5. Early life conditions that impact song learning in male zebra finches also impact neural and behavioral responses to song in females: Developmental Stress in Female Songbirds

   https://doi.org/10.1002/dneu.22600  

   Sewall, Kendra B. ; Anderson, Rindy C. ; Soha, Jill A. ; Peters, Susan ; Nowicki, Stephen ( August 2018 , Developmental Neurobiology)