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Yellow-necked Mouse

(Apodemus flavicollis)

Size: 10-12cm – 15cm tail Weight: 25-50g Lifespan: max. 2 years


Identification: A very large mouse with a very long tail, large hairy ears and large protruding eyes. The dorsal fur is more orange than wood mice. This is contrasted with white fur underneath. The dorsal fur joins to form a distinctive collar round the neck. The similar but smaller wood mouse is the only confusion species. General: A native species locally common in both the countryside and urban areas, their favoured habitats are hedgerows, woodland and orchards. Yellow-necked mice can be communal nesters - nests being usually underground or in any suitable hole, including bird nest boxes, where the young remain until they are weaned by 4 weeks. They develop quickly and can breed at 10 weeks old. They are highly adaptable and opportunistic being omnivorous and feeding on everything from seeds, buds, insects, worms, fruit Yellow neck and carrion. They are largely nocturnal and are excellent climbers - able to feed in large trees. They have many native predators. Distribution - UK: There are estimated to be approx. 1 million yellow-necked mice distributed mainly in the Midlands and the south and east of England. The population is stable.

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Cambridgeshire Mammal Atlas  
Cambridgeshire Mammal Atlas