Grizzly bears began arriving in northwestern Montana’s Blackfoot Valley in the late 1990s. Their population in surrounding mountains multiplied and gradually spread out, coming down from higher elevations into the green pastures of cattle country to search for food, returning to habitat bears had...

Decaying logs and miniature bogs, hollowed stalks and piled rocks, nutritious pollen and leaves fallen: They’re not the stuff of traditional nursery rhymes and baby showers. But if wild mothers-to-be had gift registries, these natural supplies would top the list. Though the basic elements for...