Abstract
Five species of cestodes and 1 species of trematode, for a total of 4,770 (chi- =79.5) helminths, were obtained from 60 American avocets, Recurvirostra americana, collected from July to September 1985 and 1986 in the Salt Lake basin, Utah. The most prevalent parasite was the cestode Diplophallus coili (95%). It occurred in mature pairs 90% of the time. All species of helminths showed a contagious distribution except for mature D. coili, which had a uniform distribution. This uniform distribution, which is unusual for species of helminths, has been observed for at least 4 species of large tapeworms in the recurvirostrids. The helminth community consisted of 3 specialists, 1 generalist, and 2 of uncertain status. The same specialists have been reported also in R. americana from Texas, Colorado, and Manitoba, Canada.
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