Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) male sitting in tree, portrait. Hokkaido, Japan. March
01659066
Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) male feeding on Japanese alder (Alnus japonica) flower, perched on tree snag. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) on tree trunk beside nest hole. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) perched on tree snag. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) perched on tree snag after emerging from nest, nest lining material on squirrel's head. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) perched on branch. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) male on branch, active during day due to competing for attention of female in oestrous. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) sitting on branch. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) pair mating on tree trunk. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) pair mating on tree trunk. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) pair mating on tree trunk. Hokkaido, Japan. March.
01659051
Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) pair mating on tree trunk, female putting up resistance, dislodging male. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) pair on tree trunk, male in pursuit of female, copulating and female returning to nest. Hokkaido, Japan. March. Digital composite sequence.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) pair, male in pursuit of female in oestrus, female spinning around to indicate she is not ready. Hokkaido, Japan. March. Digital composite sequenc...
01659048
Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) pair on tree trunk at dusk, one peering out of nest, the other perched on branch. Hokkaido, Japan. March.
01659047
Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) sitting on tree trunk at night near nest hole. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) pair on tree trunk, female in oestrus in nest hole, male sitting on guard above to fend off approaching males. Hokkaido, Japan. March.
01659045
Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii), male attempting ambush attack on other, in competition over female in oestrus. Hokkaido, Japan. March.
01659044
Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii), two males in competition during mating season, one feeding startled by other approaching on tree trunk. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii), two males on tree trunk, one leaping on other in ambush during mating season. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) on tree trunk. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) male in tree. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) male in tree. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) male in tree, portrait. Hokkaido, Japan. March.
01659038
Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) male sitting in tree, portrait. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) grooming whilst sitting on branch. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) pair mating, crack in tree trunk is entrance to nest hole. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) grasping onto branch at dusk. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) sitting on tree trunk outside nest hole at dusk. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) emerging from nest hole at dusk. Hokkaido, Japan. March.
01659031
Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) sitting on branch in forest at dusk, after emerging from nest hole. Hokkaido, Japan. March.
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Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) peering out of nest hole in tree trunk. Hokkaido, Japan. March.
01659029
Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) male gliding between trees. Hokkaido, Japan. March.
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Tony Wu / Siberian flying squirrel (Pteromys volans orii) emerging from nest hole in tree at dusk. Hokkaido, Japan. March.
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Tony Wu / Siberian flying squirrel (Pteromys volans orii) eating buds in tree. Hokkaido, Japan. March.
01628710
Tony Wu / Siberian flying squirrel (Pteromys volans orii) feeding on Sakhalin fir tree. Hokkaido, Japan. March.
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Tony Wu / Siberian flying squirrel (Pteromys volans orii) sitting in tree at dusk. Hokkaido, Japan. March.
01628708
Tony Wu / Siberian flying squirrel (Pteromys volans orii) emerging from nest hole in tree trunk. Hokkaido, Japan. March.
