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Wolves from the Yukon and Northwest Territories harbored the following gastrointestinal helminths: Alaria americana (10 of 171), A. arisaemoides (2/171), Diphyllobothrium sp, (1/171). Mesocestoidcs kirbyi (3/171), Taenia hydatigena (54/111), T. krabbei (63/111), T. pisiformis (2/111), T. serialis (41/111), Echinococcus granulosus (24/171), Toxascaris leonina (83/171). Uncinaria stenocephala (11/171), Spirocerca arctica (1/171), and S. lupi (1/171). Larval Trichinella spiralis occurred in 72 of 153 diaphragms. A. arisaemoides, M. kirbyi, and S. arctica were found for the first time in Canis lupus, while S. lupi, S. arctica, and the prevalence of T. spiralis in wolves are reported for the first time in Canada.

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SummaryWhooping Cranes Grus americana increased from 16 wild migratory birds in 1941 to about 146 birds in 1991. Management on the breeding range in Wood Buffalo National Park, Northwest Territories-Alberta, and protection of the birds along their migration route and on the winter range in Texas, are partly responsible for the population increase. The present Wood Buffalo National Park-Aransas National Wildlife Refuge flock consists of almost 50% non-breeders, mostly subadults. Further increases in the number of breeding pairs beyond the 1991 record of 33 can therefore be expected. The wild population has been a source of surplus eggs, whose removal has not adversely affected population growth. These eggs have been used to establish captive flocks, and captive-reared stock will be used to establish other populations. Attempts to establish a new migratory flock in Idaho by means of cross-fostering Whooping Crane eggs to Sandhill Cranes Grus canadensis have not been completely successful. Present plans call for the establishment of a non-migratory flock in Florida.