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ENDOPARASITES OF BLACK-BELLIED WHISTLING DUCKS IN SOUTHERN TEXAS

Endoparasites detected in the black-bellied whistling duck (Dendrocygna autumnalis) include one nasal mite, four nematodes, three trematodes, five cestodes, and two acanthocephalans. Each of these represents a new host record. Overall, 47% of the birds were parasitized with an average of 12 helminths per infected bird. Helminths were significantly more common in juveniles than in adults; more females than males were parasitized, but the difference was not statistically significant. No correlation existed between the parasite load and the physical condition of the host. Tissue damage in infected birds was minimal and limited to nematode cysts in the proventriculi. Parasite loads were light, apparently reflecting the food habits of the host.