Until recently there were only two species of flying squirrels in North America. But the Northern and Southern species have been getting cozy and are interbreeding. WSJ’s Angus Loten reports.

Apart from these differences, and larger size, the northern flying squirrel resembles the southern. Adults are 250-298 mm (10-11.7 in) in total length, and weigh 75-125 g (2.6-4.4 oz). The range is ...

There are red squirrels, gray squirrels, even flying squirrels on Wikipedia. We'd propose another category: College Squirrel. Tiny, tough and used to the noise and chaos of students, College Squirrel ...

While locking the back door at night, a movement on one of the hanging suet feeders caught my eye. It wasn’t wind making it ...

They're not called the “ninja of the forest” for nothing. When night falls, the Siberian flying squirrel glides through the air from tree to tree in the forests of Hokkaido. But when the ...