Species richness is the number of species in an area. It is one way to measure biodiversity. You might have conducted a field investigation to find the species richness of an area near your college or school. The chances are that you investigated plant species. Why? Because, unlike animals, most plants stay put while you identify and count them.
So how can we monitor mobile animal species in a terrestrial environment? Conventional traps might harm the animals and usually only catch one specimen at a time. A cloth screen with a bright light behind it will attract nocturnal moths, which can be identified as they rest harmlessly on the cloth. But what about larger animals?
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