Australia's average surface temperature has risen more than 1 Fahrenheit degree since 1900. During roughly the same period, the body size of Australian passerine (perching) birds has declined by as much as 3.6 percent. Zoologist Janet L. Gardner of the Australian National University in Canberra and colleagues, who detectedrnthe shrinking trend in birds, suspect the two changes are no coincidence.
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机译：自1900年以来，澳大利亚的平均地表温度已上升了1华氏度以上。在大致同一时期，澳大利亚雀形目（栖息）鸟类的体型下降了多达3.6％。堪培拉澳大利亚国立大学的动物学家珍妮特·L·加德纳（Janet L. Gardner）及其同事发现了鸟类的萎缩趋势，他们怀疑这两种变化不是巧合。
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