Japanese dwarf flying squirrels (Pteromys volans orii) forage on a number of plant species, one of which is the Sakhalin fir (Abies sachalinensis). The squirrels select the tips of fir branches, where tender new leaves can be found. After breaking off a branch tip, the squirrels frequently consume only some of the leaves before tossing the branch away, resulting in a partially eaten branch tip, as pictured here.
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