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Endangered Species Research

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ESR 34:103-107 (2017)  -  DOI:

Survival of adult reddish egrets Egretta rufescens marked with satellite transmitters

Lianne M. Koczur1,*, Bart M. Ballard1, M. Clay Green2

1Caesar Kleberg Wildlife Research Institute, Texas A&M University-Kingsville, Kingsville, Texas 78363, USA
2Department of Biology, Texas State University, San Marcos, Texas 78666, USA
*Corresponding author:

ABSTRACT: The reddish egret Egretta rufescens is the rarest heron in North America, and there are many information gaps in our understanding of its ecology. The population size of the reddish egret is relatively small, and although its range spans from the Gulf Coast of the United States to the northern coast of South America, it is restricted to shallow, coastal lagoon systems. Nest survival and juvenile survival have been examined in the reddish egret; however, adult survival has not. We marked 30 adult reddish egrets with satellite transmitters and used the known-fate model in Program MARK to estimate monthly survival. Monthly survival estimates were high and best explained by season, with a 0.992 (95% CI: 0.974-0.997) survival rate during the breeding season and 0.949 (95% CI: 0.912-0.971) during the nonbreeding season. This is the first study to estimate adult survival of reddish egrets, and it provides new information on the ecology of the species.

KEY WORDS: Egretta rufescens · Reddish egret · Survival

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Cite this article as: Koczur LM, Ballard BM, Green MC (2017) Survival of adult reddish egrets Egretta rufescens marked with satellite transmitters. Endang Species Res 34:103-107.

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