The Panel has made the following considerations in relation to the use of dry and wet pitfall traps. Solutions such as formalin are used in wet pitfall traps because they preserve the specimen, not because they are humane because there is no rapid loss of consciousness before drowning and preserving. The use of pitfall traps was considered by the Animal Research Review Panel following concerns it had regarding the use of formalin as a killing agent in wet pitfall traps. Pitfall traps tend to be used more in low rainfall, arid habitats than in mesic environments. Pitfall trapping is a sampling technique that is widely used to examine species occurrence during surveys, spatial distribution patterns, compare relative abundance in different micro-habitats, study daily activity rhythms, and study seasonal occurrence.
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