While running through Bicentennial Park in Anchorage, biologist Jessy Coltrane spotted a porcupine in a birch tree. On her runs on days following, she saw it again and again, in good weather and bad.

While running through Bicentennial Park in Anchorage, biologist Jessy Coltrane spotted a porcupine in a birch tree. On her runs on days following, she saw it again and again, in good weather and bad.

Brazil’s thin-spined porcupine (Chaetomys subspinosus) is a picky eater that lives only in dense coastal habitats with well-developed canopies that allow the animals to move between trees; however, ...