Japanese dwarf flying squirrel (Pteromys volans orii) feeding on leaf buds of a Japanese elm (Ulmus davidiana var. japonica) during winter, Hokkaido, Japan.  ,  Plant,Vascular plant,Flowering plant,Rosid,Elm,David elm tree,Animal,Wildlife,Vertebrate,Mammal,Rodent,Old World flying squirrel,Russian Flying Squirrel,Japanese elm,Plantae,Plant,Tracheophyta,Vascular plant,Magnoliopsida,Flowering plant,Angiosperm,Spermatophyte,Spermatophytina,Angiospermae,Rosales,Rosid,Dicot,Dicotyledon,Rosanae,Ulmaceae,Elm,Elm tree,Ulmus,Ulmus�davidiana,David elm tree,Animalia,Animal,Wildlife,Vertebrate,Mammalia,Mammal,Rodentia,Rodent,Sciuridae,Pteromys,Old World flying squirrel,Pteromys volans,Russian Flying Squirrel,Siberian Flying Squirrel,Asia,East Asia,Japan,Hokkaido,Winter,Animal Behaviour,Feeding,Biodiversity hotspot,Dawn,Pteromys volans orii,Ezo momonga,Ulmus davidiana var. japonica,Japanese elm,  ,  Tony Wu