Abstract
The author has experienced considerable difficulty in successfully live-trapping shrews in the boreal forest of eastern Manitoba. Using the Sherman livetrap it was found that unless the traps were examined at hourly intervals, the mortality in Sorex einer ens and S. arcticus was 100 per cent. Recently however the Sherman trap was replaced by tumble-in traps constructed by removing the tops of clean imperial-quart oil cans. These are then imbedded grid fashion on the plot flush with the ground level and baited with raw liver or ground beef. Captured animals are easily removed by removing the trap and inverting it into a plastic food bag where the animal is either marked and released or transported to the field laboratory. In the majority of cases, animals taken by this method were alive and well after remaining in the traps until the following morning. When the operator...

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