Discovery News recently reported on warmer temperature's size-stifling effect on plankton, the base of the marine ecosystem.
BLOG: Climate Change Could Shrink Animals
Warm-blooded animals weren't immune from the climate change caused size change.
Many birds are now less bulky, including passerines (the order that includes cardinals, blue jays, and crows) as well as goshawks and gulls.
Mammals have been miniaturized too. Soay sheep are scrawny. Red dear are runts. And polar bears are puny, compared to historical records.
This isn't the first time this has happened in Earth's history.
Fifty-five million years ago, a warming event similar to the current climate change correlated to beetles, bees, spiders, wasps and ants shrinking by 50 to 75 percent over several thousand years.
Woodrats and squirrels also shrunk by about 40 percent.
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That event, the Palaeocene-Eocene Thermal Maximum, happened over a longer time than the current global warming.
The speed of modern climate change could mean, "organisms may not respond or adapt quickly enough", especially those with long generation times, said the authors in PhysOrg.