Figure 2: Number of dung beetles consumed by burrowing owls in the presence (blue) and absence (orange) of cow dung positioned at their burrows. | Nature

Figure 2: Number of dung beetles consumed by burrowing owls in the presence (blue) and absence (orange) of cow dung positioned at their burrows.

From: Use of dung as a tool by burrowing owls

Figure 2

Averages and standard errors are shown; n=10 burrows per treatment in two populations (Gilchrist County, Florida). P<0.001 for both the number of individuals and the number of species (in paired t-tests). Beetles were identified by their elytra, which owls commonly discard before consumption or regurgitate in pellets. Because we restricted our sampling of prey remains to the immediate vicinity of each burrow (to an area of about 0.75 m2), the total number of beetles consumed during the trials will have been higher than indicated.

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