The Tokyo Zoological Park Society said on Dec. 11 that 31 Japanese squirrels, or “nihon-risu,” died within a week of being exposed to multiple pesticides at Inokashira Park Zoo in Musashino ...

Some flying squirrels have only one mating cycle per year but others, such as the Japanese dwarf flying squirrel, have two. The time of year for mating and birth depend on the species as well.