What time of year do hedgehogs hibernate?
They hibernate during the winter. In most cases the males enter hibernation first (and arouse first during the spring), with the females following shortly afterwards. Most hedgehogs will have started hibernation by Christmas, although it varies from place-to-place and can be heavily influenced by the weather/climate and by any supplemental food available to them. In warmer climates, such as those in New Zealand, hedgehogs may forego hibernation altogether and remain active all year.
No. Different species can have slightly different habits, all wild hedgehogs can hibernate, although not all do. Hibernation time of hedgehogs depends on their environment. In addition, domesticated species prefer a warm climate (above 72 °F/22 °C but below 85 °F/29.5 °C) and do not naturally hibernate.
Of those species only one, the hedgehog, hibernates. Squirrels and badgers often reduce their activity during the winter, but they do not hibernate. Among the British mammals, hedgehogs, dormice and bats are the only ones that truly hibernate. A host of reptiles, amphibians and insects also hibernate.
There is no preset date that hedgehogs decide to hibernate. It is not usually until November,December or January that larger Hedhehogs finally settle down to hibernation. It really depends on the air temperature. See Here: http://www.sttiggywinkles.org.uk/images/PDF/PDF%20Fact%20Sheets/Hedgehog%20Hibernation%20Fact%20Sheet.pdf