trap results can yield useful information. It might become apparent that you have two species of rat in the area, and the observations may reveal that you are only catching the one species. Or perhaps only one of the genders. Where you are catching might be relevant, int hat you notice over time that you get a lot of catch in traps that are on the ground, but not at heights above 1m, in which case you can maximise your results by focusing on ground setting. Or vice versa of course. Most, if not all, good science starts with observation.
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