THE BRITISH Trust for Ornithology reports via their Garden BirdWatch that British Hedgehogs are emerging from hibernation very late this spring. This weekly survey, which covers mammals as well as birds, shows that hedgehog emergence is roughly a month behind what was seen in 2011 and 2012. The long winter may also have led to increased levels of overwinter mortality.
British Hedgehog populations are in decline, as revealed by a recent review of figures from a suite of monitoring studies. BTO Garden BirdWatch is one of a number of studies that are being used to monitor Hedgehog populations, providing additional information on hibernation patterns.