http://news.bbc.co.uk/1/hi/uk/8591686.stm
The number of small birds – including coal tits and goldcrests – spotted in gardens has fallen as a result of this winter's big freeze, the RSPB has said.
These results highlight the importance of feeding and gardening for wildlife, especially during prolonged cold periods
But surely this colder winter is more "back to normal" for the UK, so the previous small bird population was artificially high and by providing alternative food sources we're helping to sustain an artificially high small bird population?