# Hazel grouse (*Tetrastes bonasia*)

Canonical page: https://creaturedata.com/animals/hazel-grouse  
Data as of: 2026-11-11

The hazel grouse (Tetrastes bonasia), also called hazel hen or northern hazel grouse, is a bird in the family Phasianidae and the order Galliformes. It is a small bird with an adult body mass of 384.5 g, with reported values from 369 g to 429 g. The hazel grouse is a sedentary herbivore of woodland habitat, with a geographic range of 15,670,000 km². It lays 1 clutch of 9 eggs per year, incubated for 25 days, and is listed as Least Concern on the IUCN Red List.

## Quick facts

| Fact | Value |
|---|---|
| Weight | 369 g – 429 g |
| Length | Not recorded |
| Lifespan | 7.25 years |
| Diet | Herbivore |
| Main food | Not recorded |
| Habitat | woodland |
| Egg incubation | 25 days |
| Young per litter or clutch | 8.8 – 9 |
| Age at maturity | 11.9 months |
| Litters or clutches a year | 1 |
| Lifestyle | Generalist |
| Migration | Sedentary |
| Conservation status | Least Concern (IUCN) |
| Countries on record | Not recorded |

## Classification

- kingdom: Animalia
- phylum: Chordata
- class: Aves
- order: Galliformes
- family: Phasianidae
- genus: Tetrastes
- species: *Tetrastes bonasia* (Linnaeus, 1758)

Synonyms: *Bonasa bonasa*, *Bonasa bonasia*, *Bonasa canescens*, *Bonasia bonasia*, *Tetrao canus*, *Tetrastes bonasa*

## Common questions

### What kind of animal is the hazel grouse?

The hazel grouse is a bird in the family Phasianidae and the order Galliformes.

### How heavy is the hazel grouse?

An adult hazel grouse weighs 384.5 g, with reported values from 369 g to 429 g.

### What does the hazel grouse eat?

The hazel grouse is a herbivore.

### What habitat does the hazel grouse live in?

The hazel grouse lives in woodland and is sedentary.

### Is the hazel grouse endangered?

No. The hazel grouse is listed as Least Concern on the IUCN Red List, which is not a threatened category.

### How many eggs does the hazel grouse lay?

The hazel grouse lays 9 eggs per clutch and 1 clutch per year, with an incubation period of 25 days.

### How long does the hazel grouse live?

The hazel grouse has a lifespan of 7.25 years.

### Who named the hazel grouse?

The hazel grouse, Tetrastes bonasia, was named by (Linnaeus, 1758).

## Sources

- [An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles](https://doi.org/10.6084/m9.figshare.3563457.v1), CC0 1.0, E096-269. Myhrvold, N.P., Baldridge, E., Chan, B., Sivam, D., Freeman, D.L. & Ernest, S.K.M. (2015) An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96: 3109. https://doi.org/10.1890/15-0846R.1. Data: https://doi.org/10.6084/m9.figshare.3563457.v1
- [AVONET: morphological, ecological and geographical data for all birds](https://doi.org/10.6084/m9.figshare.16586228.v7), CC BY 4.0, v7. Tobias, J.A. et al. (2022) AVONET: morphological, ecological and geographical data for all birds. Ecology Letters 25: 581–597. https://doi.org/10.1111/ele.13898. Data: https://doi.org/10.6084/m9.figshare.16586228.v7
- [Catalogue of Life eXtended Release](https://www.checklistbank.org/dataset/316691), CC BY 4.0, 2026-10-16 XR. Catalogue of Life (2026). Catalogue of Life eXtended Release, version 2026-10-16 XR. Catalogue of Life Foundation, Amsterdam, Netherlands. https://doi.org/10.48580/dgzlf
- [Wikimedia Commons](https://commons.wikimedia.org), per file (CC0 / public domain / CC BY green, CC BY-SA amber, anything else not displayed), 2026-11-11. Wikimedia Commons contributors. Wikimedia Commons. https://commons.wikimedia.org (each file credited to its author under its own licence).
- [Wikidata](https://www.wikidata.org), CC0 1.0, 2026-11-11. Wikidata contributors. Wikidata. https://www.wikidata.org (data retrieved via the Wikidata Query Service).
- [Wikipedia (English)](https://en.wikipedia.org), CC BY-SA 4.0, 2026-11-11. Wikipedia contributors. Wikipedia, The Free Encyclopedia. https://en.wikipedia.org (text under CC BY-SA 4.0; each block names its article and revision).

Cite as: Hazel grouse (Tetrastes bonasia). Retrieved from https://creaturedata.com/animals/hazel-grouse