Skillen, E.L., Pickering J., et al., 1998
Figure. 2 Estimates of species richness by the Eadie-Hofstee, Lamas et al., Chao1 and Chao2 methods and species accumulation to effort relationship of Campopleginae at Patuxent, Traps 1 and 2, 1993. The solid line represents the average number of species as a function of sampling effort.