- 4.7–5.5 in
- 8.7 in
- 0.3–0.4 oz
- Moucherolle de Hammond (French)
- Mosquerito passajero (Spanish)
- Early in the breeding season male Hammond's Flycatchers fight so vigorously defending their territories that they often become locked together in midair, fluttering to the ground.
- The Hammond's Flycatcher pulls wings off moths before consuming their bodies.
- The oldest recorded Hammond's Flycatcher was a female, and at least 7 years old when she was recaptured and rereleased during banding operations in Oregon.
Cool forests, especially coniferous or mixed forests with fir trees.
Flying insects and caterpillars.
- Clutch Size
- 3–4 eggs
- Egg Description
- Creamy white, sometimes marked sparingly with small reddish-brown dots.
- Condition at Hatching
- Helpless, eyes closed.
A compact cup of plant fibers and fine grass placed on large limb of conifer tree.
Takes insects on the wing; perches on dead branches and twigs between forays.
Hammond's Flycatcher populations are stable and slightly increased between 1966 and 2015, according to the North American Breeding Bird Survey. Partners in Flight estimates a global breeding population of 19 million with 42% spending some part of the year in the U.S., 82% in Mexico, and 58% breeding in Canada. The species rates a 10 out of 20 on the Continental Concern Score. Hammond's Flycatcher is not on the 2016 State of North America's Birds' Watch List. The species' preference for mature forests suggests that logging of old-growth forests may pose an eventual threat.