Fourteen species of endohelminths, including 1 acanthocephalan, 3 cestodes, 1 nematode, and 9 trematodes, were collected from 13 little blue herons Egretta caerulea from the area of Galveston, Texas, U.S.A. A mean of 4.3 (3–6) species of endohelminths per host was found. Five species (3 cestodes and 2 trematodes) represent new host records. Comparison of results from this study with a similar survey by Sepúlveda et al. (1996) from Florida, U.S.A., suggests some hypotheses concerning possible roles of composition and complexity of trophic structures of these 2 regions in establishment of their respective endohelminth communities in little blue herons.
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