Ben Sonnenberg, a doctoral student in the Ecology, Evolution and Conservation Biology program, studies chickadees with Vladimir Pravosudov. Sonnenberg has coauthored many publications about the ...

I am pelted by wet snow as I climb above 8,000 feet in the Sierra Nevada of eastern California, tugging a sled loaded with batteries, bolts, wire and 40 pounds of sunflower seeds critical to our ...

Mountain chickadees struggle with snow extremes. Benjamin Sonnenberg. Wet snow pelts my face and pulls against my skis as I climb above 8,000 feet in the Sierra Nevada of eastern California, tugging a ...

I’ve been snooping on cavity nesters of late. Thank goodness a bit of their nesting lives takes place where humans can relish the action. To wit, a nest box in the yard where a black-capped chickadee ...