Fig. 4 in Phylogeny identifies multiple colonisation events and Miocene aridification as drivers of South Asian bulbul (Passeriformes: Pycnonotidae) diversification

Fig. 4 Lineage through time plot of Asian bulbuls. LTT plot of the logarithm number of species against millions of years before present derived from the Bayesian chronogram. Red line represents the actual plot compared against the expected LTT plot under a pure birth–death model of diversification (black solid line) and 95% CI (black dotted lines). CI was estimated using 100 stochastic trees simulated to have the same speciation rate, extinction rate, no. of taxa and diversification time as the input tree