Harsh winters have devastated Scotland’s Wren population – latest figures from the BTO/JNCC/RSPB Breeding Bird Survey (BBS), released today, show that numbers fell by 40% between 2009 and 2010.
As one of Britain’s smallest birds, Wrens lose body heat very easily. During cold winters they are known to roost huddled together for warmth, but, despite this, mortality during harsh weather is often high.
Disrupting the Borg is expensive and time consuming!
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Real Science 
Sounds like environmental groups could actually do some good and spend money on Wren shelters …….
But I thought it was getting hotter. What happened? Must be a localized Scottish problem, too much hagiss and sheep flatulence.
Aaah but that cold is warmcold, a characteristic of warmer winters, and particularly deadly. In the past we had coldcold, which of course didn’t kill anyone or anything.