Dan and Casey talk to PhD Candidate Sonnie Flores about her work on saltwater crocodile acoustic communication and behaviour. REFERENCES Sonnie's Paper Flores, S.A., Dwyer, R.G., Parsons, S., Potvin, D.A., 2026. Roars, Rumbles, and Resonance: A Systematic Review and Meta-Analysis of Crocodylian Acoustic Signals. Ecology and Evolution 16, e72494. https://doi.org/10.1002/ece3.72494 Formants and honesty in alligator acoustic signals Reber, S.A., Janisch, J., Torregrosa, K., Darlington, J., Vliet, K.A., Fitch, W.T., 2017. Formants provide honest acoustic cues to body size in American alligators. Scientific reports 7, 1–11. https://doi.org/10.1038/s41598-017-01948-1 Reber, S.A., Nishimura, T., Janisch, J., Robertson, M., Fitch, W.T., 2015. A Chinese alligator in heliox: formant frequencies in a crocodilian. J Exp Biol 218, 2442–2447. https://doi.org/10.1242/jeb.119552 Potential individuality in alligator bellows Jensen, T.R., Anikin, A., Osvath, M., Reber, S.A., 2024. Knowing a fellow by their bellow: acoustic individuality in the bellows of the American alligator. Animal behaviour 207, 157–167. https://doi.org/10.1016/j.anbehav.2023.11.009 Call frequency decreases as hatchlings age Vergne, A.L., Avril, A., Martin, S., Mathevon, N., 2007. Parent-offspring communication in the Nile crocodile Crocodylus niloticus: Do newborns’ calls show an individual signature? Die Naturwissenschaften 94, 49–54. https://doi.org/10.1007/s00114-006-0156-4 Sequences of courtship displays varies among species, but the elements that are displayed stay the same Garrick, L.D., Lang, J.W., 1977. Social Signals and Behaviors of Adult Alligators and Crocodiles. American zoologist 17, 225–239. https://doi.org/10.1093/icb/17.1.225 Crocodilians adjust signals due to habitat type – but evidence for this is conflicting as one paper supports this and the other does not Dinets, V., 2013. Do individual crocodilians adjust their signaling to habitat structure? Ethology, ecology & evolution 25, 174–184. https://doi.org/10.1080/03949370.2012.744358 Dinets, V., 2013. Long-Distance Signaling in Crocodylia. Copeia 2013, 517–526. https://doi.org/10.1643/CE-12-125 Behaviours differ between captive and wild American alligators Walsh, Z.C., Olson, H., Clendening, M., Rycyk, A., 2022. Social Behavior Deficiencies in Captive American Alligators (Alligator mississippiensis). Journal of Zoological and Botanical Gardens 3, 131–146. https://doi.org/10.3390/jzbg3010011 Gharial pops show differences in individual identity and context based on temporal parameters Ajji M, J., Lang, J.W., 2025. Gharial acoustic signaling: Novel underwater pops are temporally based, context-dependent, seasonally stable, male-specific, and individually distinctive. Journal of anatomy. https://doi.org/10.1111/joa.14171 Low frequency signals produced by the African dwarf crocodile Staniewicz, A., McCabe, G., Holderied, M., 2023. The low-frequency vocal repertoire of adult African dwarf crocodiles. African Journal of Herpetology 1–16. https://doi.org/10.1080/21564574.2023.2237035
