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Sources:
2020 Women advancing female birdsong research
https://www.sciencedirect.com/science/article/abs/pii/S0003347220302256?via%3Dihub
2019 Why females sing?—pair communication/other song functions in eastern bluebirds
https://academic.oup.com/beheco/article-abstract/30/6/1653/5543280?redirectedFrom=fulltext
2018 The Invisible Women. American Ornithological Society
2016 Typical Males & Unconventional Females: Songs & Singing Behaviors of Duetting Oriole
https://www.frontiersin.org/articles/10.3389/fevo.2016.00014/full
2016 Female in-nest chatter increases predation
https://royalsocietypublishing.org/doi/10.1098/rsbl.2015.0513
2015 Female songbirds still struggling to be heard
https://pubmed.ncbi.nlm.nih.gov/16701408/
2015 Functional aspects of song-learning in songbirds (male)
http://courses.washington.edu/ccab/B&B%20TREE%202005.pdf
2014 Female song widespread & ancestral in songbirds
https://www.nature.com/articles/ncomms4379
2008 Females sing more frequently than males in Streak-backed Oriole
https://academic.oup.com/condor/article/110/2/387/5152393
2006 Female finery is not for males
https://www.cell.com/trends/ecology-evolution/fulltext/S0169-5347(06)00030-9?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS0169534706000309%3Fshowall%3Dtrue
2005 Male & female song structure & singing behaviour in duetting eastern whipbird Psophodes olivaceus
https://www.publish.csiro.au/zo/ZO04083
2003 The “Mute” Sex Revisited: Vocal Production & Perception Learning in Female Songbirds
https://www.sciencedirect.com/science/article/pii/S0065345403330025?via%3Dihub
https://link.springer.com/article/10.1007%2Fs00265-003-0741-x
defense?
https://link.springer.com/article/10.1007%2Fs00265-002-0488-9
1998 Functions of duet & solo songs of female birds
https://www.cell.com/trends/ecology-evolution/fulltext/S0169-5347(97)01241-X?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS016953479701241X%3Fshowall%3Dtrue
BIRDSONG Ball, G. F., & Hulse, S. H. (1998). Birdsong. American Psychologist, 53(1), 37–58.
https://doi.org/10.1037/0003-066X.53.1.37
1996 Female song attracts male alpine accentors Prunella collaris
https://royalsocietypublishing.org/doi/10.1098/rspb.1996.0022
1986 Sexual selection & the evolution of song
https://www.researchgate.net/publication/234150518_Sexual_Selection_and_the_Evolution_of_Song
The Female Bird Song Project
https://ebird.org/news/femalebirdsong17/
Images:
https://en.wikipedia.org/wiki/File:John_Gould_Zoology_of_the_Voyage_of_the_Beagle_Pyrocephalus_nanus.jpg
https://en.wikipedia.org/wiki/File:Subdesert_Mesite.jpg
https://commons.wikimedia.org/wiki/File:Vogel_op_curacau.JPG
https://commons.wikimedia.org/wiki/File:Venezuelan_Troupial_pair.jpg
https://en.wikipedia.org/wiki/File:Male_and_female_superb_fairy_wren.jpg
https://commons.wikimedia.org/wiki/File:Bird-lore_(1901)_(14732651936).jpg
https://commons.wikimedia.org/wiki/File:Bird-lore_(1917)_(14569117928).jpg
https://en.wikipedia.org/wiki/File:Monitoreo_de_Aves_a_Largo_Plazo.jpg
https://commons.wikimedia.org/wiki/File:Kathy_Martin_holding_a_willow_ptarmigan_in_1983.jpg
https://commons.wikimedia.org/wiki/File:Collecting_data_(33802854470).jpg