Figure 13.13 Smaller populations and the likelihood of extinction. Bird populations of the Channel Islands off the coast of California were measured in terms of the number of breeding pairs. Islands with larger population sizes had a reduced probability of going extinct over a period of 80 years.

Data from H. L. Jones and J. M. Diamond, Short-time-based studies of turnover in breeding bird populations on the California Channel Islands, Condor 78 (1976): 526–549.