The chickadee flew right past me to a tree 15 feet away and disappeared into a hole in a gnarly ponderosa pine. It emerged less than a minute later, watched me for a moment and left to collect more ...

Black-capped (Poecile atricapillus) and mountain (P. gambeli) chickadees are common backyard birds native to the Colorado Front-Range with broadly overlapping distributions in western North America.

A caterpillar on a maple leaf. Photo by Jeff Tome. I’ve found entertainment in my yard in the past few weeks. I’ve been watching Black-capped Chickadees nesting in a dead tree. The tree they chose is ...

We investigated the impact of two natural pulses (food and nesting resources) on intra- and inter-specific territorial behaviour of species that co-occur year-round in multi-species groups. We ...

NORTH SLOPE, Alaska — “Chick chick whirrr, chick whirrr.” Although it was a recorded birdsong that chattered through each of the poplar stands we entered, I still occasionally caught myself believing ...

Now is the time of the year black-capped chickadees seek nest sites for the breeding season. This species is a year ‘round resident and is considered an obligate cavity nester and will use nest boxes ...

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 ...

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 ...

DEAR JOAN: A few months ago, we built a nest box for a screech owl as we had heard some in our area. Now, several months later, after mounting the box in a tree and filling it with wood shavings, ...

Female chickadees living in monogamous mating systems will proactively seek out males that have better cognitive skills than ...