A new study of Shetland Eurasian Wrens reveals how island isolation drove the evolution of larger body size, shedding light on rapid changes in bird populations. A study of Shetland's unique Eurasian Wren population has uncovered new evidence showing how isolation on remote islands repeatedly drove the evolution of larger body size. The research, published in Evolutionary Journal of the Linnean Society, exami... [1791 chars]