Jeff Hull

December 16, 2014 — Fifty years after launching the breeding bird survey, 70 years after starting a career in bird conservation, and nearly 100 years after his birth, Chan Robbins is still watching closely.

December 13, 2012 — The winter landscape can appear essentially barren of wildlife, but a surprising array of life thrives above, within, and beneath blankets of snow.

December 12, 2012 — Wolves battle for territory. Coyotes endure love triangles. Wolverine fathers show their kits the ropes. Few places offer more intimate wildlife viewing than Yellowstone in winter.

March 29, 2012 — Yellowstone’s rebounding grizzly bear population is an undeniable success. But figuring out how to manage the threatened omnivores—in light of potential food shortages and deadly human-grizzly interactions—isn’t so easy.

December 19, 2011 — Wolverines, long admired for their ferocity and canniness, are so elusive that few people have even seen one. Now biologists are racing to find them before trappers do.