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Over the past century, the Javan rhinoceroses' (Rhinoceros sondaicus) secluded nature and low population size have led to a gap in knowledge of their ecology. With fewer than 80 individuals surviving in a single population in West Java, Indonesia, the Javan rhinoceros is one of the most critically endangered mammals in the world. As part of a pilot bioacoustics study of the Javan rhinoceros in 2019, we systematically reviewed camera trap footage from the core Javan rhinoceros range in Ujung Kulon National Park (UKNP). In doing so, we discovered a previously unknown interaction between the Javan rhinoceros and the slender‐billed crow (Corvus enca), in which the crow finds and eats ectoparasites from the rhinoceros (Figure 1). We describe this interaction and suggest that it may represent a cleaning mutualism with benefits for both the crow and the rhinoceros. [ABSTRACT FROM AUTHOR]

The article describes the dietary habits of the Coachwhip snake, Masticophis flagellum. Topics include the snake's primary diet, which mainly consists of lizards and occasionally other reptiles, mammals, insects, and birds; an observation of M. flagellum preying on a Verdin (Auriparus flaviceps) nest in Pima County, Arizona, where it consumed nestlings; and details about the unusual nest placement that may have increased vulnerability to snake predation.