Bird Profile

Pine Grosbeak

The largest and tamest of the northern finches, and the least likely to visit your feeder. Pine Grosbeaks come south for fruit first and sunflower second.

The Pine Grosbeak is the biggest finch in North America, close to a robin in length and noticeably heavier looking, with a long notched tail, a small rounded head and a short, thick, dark bill with a curved upper edge. Adult males are washed rosy red over the head, back, breast and rump, with gray flanks and belly and blackish wings crossed by two clean white bars. Females and young males swap the red for gray with a mustard-olive or russet-orange head and rump.

They are birds of the boreal and montane conifer forest, and in most winters they stay there. Pine Grosbeaks are the least frequent of the northern finches at feeders south of Canada, and when they do come, they often show more interest in the crabapple by your driveway than in anything you put out.

This profile covers how to tell them from the other rosy finches, how the irregular southward movements actually work, what they eat and what you can plant to hold them, and the temperament that makes a Pine Grosbeak the easiest bird you will ever photograph and one of the easiest for a cat to reach.

How to identify a Pine Grosbeak#

Size is the first clue and the one people trust least. A Pine Grosbeak is a big bird, 8 to 10 inches (20 to 25 cm) long and weighing roughly 2.5 oz (70 g), which is two and a half times the weight of a Purple Finch. Seen alone it can be hard to judge, but in a fruit tree beside anything familiar the bulk is obvious.

The bill is diagnostic and small for the bird: short, stubby, blackish, with a distinctly curved culmen that gives it a blunt, parrot-like profile. It is a bud and fruit bill, not a heavy seed cracker, and it looks undersized next to the head.

Adult males are a soft rosy red rather than the raspberry of a Purple Finch or the orange-red of a House Finch, and that red covers the head, back, breast and rump while the flanks and belly stay clean gray. Females, immatures and young males are gray-bodied with a variable wash of olive-yellow, mustard or coppery russet on the head and rump. Both sexes show two crisp white wing bars against dark wings.

The voice is a clear, musical three-note whistle, often written as tew-tew-tew, plus a soft warbled song. Call types vary regionally in this species, so birds from different populations do not all sound the same, which is worth knowing before you draw conclusions from a recording.

Confusion species

The wing bars are the shortcut. A big rosy finch with two clean white bars on dark wings and a stubby curved bill is a Pine Grosbeak. More comparisons are in the finch identification guide.

Where and when Pine Grosbeaks show up#

Pine Grosbeaks breed in open spruce and fir forest across Alaska and boreal Canada, and down the western mountains through British Columbia, the northern Rockies, the Cascades and the Sierra Nevada, reaching high-elevation forest in Utah, Colorado, Arizona and New Mexico. Western mountain birds are often present year-round, moving downslope in winter rather than long distances south.

East of the Rockies the picture is different. Southern Canada sees them regularly, northern New England, upstate New York, Michigan, Wisconsin and Minnesota see them in some winters, and the rest of the country almost never does. Reaching Pennsylvania or Iowa is an event that birders drive for.

When they do arrive it is usually between November and early March, in small loose flocks of half a dozen to twenty birds, and often at a fruit tree rather than a feeder.

Irruption years, honestly#

Pine Grosbeak movements follow the same broad logic as other northern finches: when the food supply at home fails, birds leave. For this species the critical crop is fruit, especially mountain ash berries across the boreal zone, along with conifer seeds and buds. A widespread mountain ash failure pushes birds south.

Two honest caveats. Pine Grosbeaks irrupt less often than redpolls and siskins, and the timing is not a tidy alternating cycle, so a forecast for a good redpoll year tells you nothing about grosbeaks. And when they do move, they concentrate wherever fruit is left standing, which means the flock lands on a specific street with fruiting trees rather than spreading evenly across a region.

What Pine Grosbeaks eat#

The winter diet is built around buds, seeds and fruit. Pine Grosbeaks strip the buds of maple, birch, willow, aspen and conifers, take seeds from spruce and pine cones, and feed heavily on persistent fruit. A characteristic habit at a mountain ash or crabapple is to crush the fruit, extract and swallow the seeds, and drop the pulp, so the ground beneath a feeding flock is littered with discarded skins.

In summer they add insects, and nestlings are fed a mix of insect material and regurgitated plant food. At feeders, the list is short.

If you are choosing one seed, make it black oil sunflower or sunflower hearts. Hearts are the better bet here, because the bill is built for buds and fruit rather than for splitting heavy hulls.

The feeder setup Pine Grosbeaks actually use#

This is a heavy, deliberate bird that lands, settles, and feeds slowly. It wants a surface it can stand on.

• A large platform or tray feeder is the right answer, ideally big enough for several birds at once.
• A wide-ledged hopper feeder works as a second choice.
• Tube feeders are close to useless for them. A grosbeak may cling briefly at a port, but it will not stay.
• Ground and deck-rail feeding both work. They forage on the ground for grit and fallen seed without hesitation.
• Open water is used heavily, and in freezing weather a heated bath is a stronger draw than seed. See winter water.

Pine Grosbeaks also come to roadside grit and salt, which is a genuine hazard in snowy regions. If you want to offer minerals, keep them in the yard on a tray rather than encouraging birds to a road edge; see grit and calcium.

Behavior worth knowing#

The trait everyone notices is the tameness. Pine Grosbeaks move slowly, sit still for long stretches, and often ignore people entirely; some old field names for the bird amount to variations on the word for a slow, dull creature. You can frequently stand under a feeding flock and watch birds at arm's length.

That confidence is not courage, it is unfamiliarity. Birds raised in remote boreal forest have no learned wariness of people or of the animals that live around them, which makes them notably vulnerable near houses.

Flocks are loose and quiet, communicating with soft whistles as they move between trees. They mix with other northern finches at feeders and generally cause no trouble: they are too slow to squabble much, and their bulk means smaller birds simply wait.

Because they feed heavily in trees and fly fast in the open, window collisions are a real risk when a flock is working an ornamental fruit tree near a house. Treat the glass, from outside, as described in preventing window strikes.

Nesting#

Pine Grosbeaks nest in open conifer forest, typically placing a bulky, loosely built cup of twigs, rootlets and moss on a horizontal branch or in a fork, usually well off the ground and often against the trunk. The lining is fine grass, rootlets and sometimes lichen.

Clutches are commonly 2 to 5 pale blue-green eggs with dark spotting. The female incubates for roughly two weeks while the male brings her food, and both parents feed the nestlings, which leave the nest around two to three weeks after hatching. Pairs are not strongly territorial and nests are widely scattered, which is part of why the breeding biology is thinly documented.

There is nothing to offer in a backyard. They do not use nest boxes, and outside the western mountains they do not nest anywhere near feeders.

Population and conservation#

Pine Grosbeaks carry no conservation listing, and the available continental trend estimates suggest a broadly stable population. That statement deserves a caveat: this is a bird that breeds at low density across a vast, roadless boreal and montane range, and standard roadside breeding surveys cover it poorly. Winter counts swing with irruption cycles rather than tracking abundance. The honest summary is that there is no evidence of a serious decline, and the evidence base is thinner than for feeder birds farther south.

The pressures worth naming are habitat: logging of mature conifer forest, and the longer-term effects of a warming climate on boreal and high-elevation forest, which squeezes montane populations upward with nowhere to go. At the scale of a yard, the useful contributions are fruiting trees, no pesticides, treated windows and indoor cats.

One practical note for irruption winters: any feeder that draws a crowd needs cleaning. Grosbeaks feed alongside redpolls and siskins, which are the species most often involved in salmonellosis outbreaks, so keep to the routine in how often to clean a feeder.

A Pine Grosbeak setup that works#

• A fruiting tree that holds its crop into winter: mountain ash, crabapple, or a regionally appropriate equivalent.
• A large open tray of black oil sunflower or sunflower hearts, kept stocked from November through March.
• Open, unfrozen water, which they use readily and visibly.
• Grit offered in the yard, not at a road edge.
• Windows treated on the outside, especially any glass near the fruit tree.
• Cats indoors, because this bird will not save itself.