House finches once were popular as singing pets, then found ways to soar when freed into the wild

Fishers are elusive and confusing to us humans; Porcupines know them all too well – as hunters

Rats really are hard to kill – as a species, anyway, with an evolutionary fail-safe for rapid breeding

Yellow-bellied sapsuckers: So vital to ecosystem that hummingbirds check travel plans with them

You can brag about those Harvard connections, but our eastern gray squirrels have them as well

Crows can indeed be scary smart

Muskrats weren’t named the way you suspect, aren’t beavers and may or may not taste good

White-breasted nuthatches are tiny but defiant, gravity-free runners who might migrate north

With help, common loons are becoming more so, but that doesn’t make their flying less awkward

For white-throated sparrows, opposites attract or their offspring pays the price with their lives