With more sub-zero temperatures on the way, many wild birds are likely to be driven into our parks and gardens in search of food.
This weekend thousands across Wales are expected to join in with the Big Garden Birdwatch - noting the highest number of each species seen in their gardens or local park, then submitting the results to the RSPB.
Last year almost 30,000 people across Wales took part in the watch, counting half a million birds between them.
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There are already 17 directly elected Mayors in England but none across the border so far.
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An additional £7 million has been put aside by the Welsh Government to build in areas where the housing supply is low.