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Both (a) three- and (b) two-toed sloths harbour a diverse ecosystem in their fur. (c–e) The more sedentary three-toed sloths (black bars) possessed (c) a greater number of moths, (d) more inorganic nitrogen in the form of 
and (e) greater algal biomass on their fur compared with two-toed sloths (grey bars). Error bars represent ±1 s.e.; *p < 0.05, **p < 0.001.
