Figure 1.

The relationship between dispersal ability and diversification rates for 28 clades of birds from Australasian archipelagoes. Dispersal abilities were estimated using the average HWI for each clade, and diversification rates were estimated using equation (2.1). The best-fitting model is a negative linear model (solid line, log(diversification rate) = 2.18–1.13 × log(dispersal)) followed by a quadratic model (dashed line, log(diversification rate) = 11.52–6.96 × log(dispersal) + 0.9 × log(dispersal)2). (Online version in colour.)