Fig. 3
The relationships between extirpation rates and incidence or average body mass of winter residents (WR), winter visitors (WV), summer residents (SR) and summer visitors (SV). The extirpation (μ) rates were model-weight averages, and incidence (an index of species richness) was the probability of presence of species on islands as described in Additional file 2: Appendix. The average body mass per island was the average species body mass per island weighted by occupancy frequency, as described in the Methods. The curves are loess fits at p < 0.05