The hen, the nest and the chicks

Ontario nesting runs from spring into early summer

Ontario's southern forest-bird habitat guide places ruffed-grouse breeding from late April through early July. It describes one brood a year, a ground nest beside a tree, stump, boulder or brush pile, and young leaving within twenty-four hours of hatching. This is a provincial habitat account, not a fixed hatch date for every latitude or year.

The woodland partridge of northern camp talk is the same ruffed grouse, Bonasa umbellus. Her spring and summer behaviour explains what happens long before the autumn flush. A hen may stay still at a nest, lead a feeding brood or distract an intruder. The appropriate response to a family seen during an ordinary walk is to give it space rather than seek a closer view.

Sources: Ontario forest-bird habitat guide, pp. 100–101 ↗ · Hinterland Who's Who: ruffed grouse ↗

The hen chooses her own nest site

After mating, the female selects a place on the forest floor. A tree base, stump or rock may provide the setting. The nest is a shallow bowl with nearby plant material, rather than a large structure high in a tree. She builds it, incubates the eggs and later cares for the brood. The male does not share those parental jobs. Hearing a drummer nearby does not mean the nest must be beside his log, or that he is guarding a family there.

That is a useful lesson for spring observation. Listen to the male from a respectful distance, but do not start searching the surrounding ground for eggs. A nest is something to leave quiet, not a destination to mark for repeated visits.

Egg ranges, incubation and replacement nests

Ontario's habitat guide lists 9 to 12 eggs; Cornell's species account gives 9 to 14. Use those as ranges reported by named sources, not competing promises for an individual nest. Cornell gives 23 to 24 days of incubation. Weather, latitude and a failed earlier nest affect the dates a walker might meet a hen with chicks.

The 1947 New York study by Bump and colleagues attributed late small broods to replacement nests after an earlier loss, rather than to routinely raising a second brood. That observation appears on printed page 291. Connecticut's wildlife account also describes replacement nesting after an early failure. A late brood is therefore a reason to leave the family quiet, not an invitation to search for a second nest.

Sources: Ontario forest-bird habitat guide, pp. 100–101 ↗ · Cornell Lab: ruffed grouse life history ↗ · Bump and colleagues: New York grouse study, 1947 ↗ · Connecticut wildlife agency: ruffed grouse biology ↗

Why she sits so still

The hen's feather pattern blends with leaves and woody cover. Remaining still helps her avoid drawing attention to the nest. She still has to leave to feed. Researchers using nest cameras in West Virginia during 1999–2001 found females incubating for about 96 percent of the recorded time, usually with a morning and an evening break. That result describes their study, not an Ontario average. It shows how much of the hen's day can be committed to keeping the clutch warm.

A brief absence is therefore not proof that a nest has been abandoned. If you happen upon one, back away and leave the eggs untouched. Do not wait beside it for the hen to return. Your presence may be the thing keeping her away.

Chicks are ready to move

Ruffed grouse hatch with down and can walk and find food within their first day. They are called precocial, meaning they are mobile soon after hatching. The hen leads the brood away from the nest, so the empty bowl soon stops being the centre of family life. The young still need her guidance, warmth and protection. Short flights develop during the first two weeks; published accounts report somewhat different ages.

Picture the family at ground level. Low plants can hide the chicks while giving them room to move. A hen crossing a trail may have young scattered close by, even when you see only the adult. Pause at a distance and let the whole group pass.

Small chicks need small food

Insects and other invertebrates are important early foods. Growing chicks are not living on the same winter menu as an adult in a budding tree. As they grow, more plant foods enter the diet. Cold, damp weather can be hard on young broods, so their first weeks involve both feeding and staying warm. The nesting season explains why cover is worth judging as a place to raise young, not only as a place that might hold an autumn bird.

The wing that looks broken

A hen with chicks may hiss, cluck or drag a wing as if injured. Hinterland Who's Who describes this as a way to draw an intruder's attention away while the chicks remain still. If you follow the adult, you may be walking directly into that distraction. Stop and back out instead. Keep a dog close, take a different route and give the birds time to settle. Do not gather up chicks that are hiding near their mother.

From scattered chicks to autumn dispersal

The old New York study describes chicks hiding after alarm calls and hens calling scattered young together, on printed pages 291 to 294. The chicks fed themselves rather than receiving food in the beak. Current Canadian accounts agree that the hen supplies care while the young find their own food. Mobile does not mean independent of her warmth and protection.

The brood changes through summer, and young birds later spread out to seek home areas. Autumn birds at a feeding spot are not automatically one intact family. Cornell notes that small groups of unrelated grouse may gather where food is productive. Record the behaviour you see without assuming a relationship you have not established. That keeps both a wildlife note and a hunting story honest.

Sources: Bump and colleagues: New York grouse study, 1947 ↗ · Cornell Lab: ruffed grouse life history ↗