Spruce grouse

Last updated

Spruce grouse
Falcipennis-canadensis-002.jpg
Male of the nominate subspecies
Falcipennis-canadensis-001.jpg
Female
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Galliformes
Family: Phasianidae
Tribe: Tetraonini
Genus: Canachites
Stejneger, 1885
Species:
C. canadensis
Binomial name
Canachites canadensis
Subspecies
  • C. c. atratus (Grinnell, 1910)
  • C. c. canace (Linnaeus, 1766)
  • C. c. canadensis (Linnaeus, 1758)
  • C. c. franklinii (Douglas, 1829)
  • C. c. isleibi (Dickerman & Gustafson, 1996)
  • C. c. osgoodi (Bishop, 1900)
Falcipennis canadensis map2.svg
Distribution map of the spruce grouse
Synonyms
  • Dendragapus canadensis(Linnaeus, 1758)
  • Tetrao canadensisLinnaeus, 1758
  • Falcipennis canadensis

The spruce grouse (Canachites canadensis), also known as Canada grouse, spruce hen or fool hen, [2] [3] is a medium-sized grouse closely associated with the coniferous boreal forests or taiga of North America. It is the only member of the genus Canachites.

Contents

It is one of the most arboreal grouse species, fairly well adapted to perching and moving about in trees. When approached by a predator, it relies on camouflage and immobility to an amazing degree; for example, letting people approach within a few feet before finally taking flight.

Taxonomy

In 1747, the English naturalist George Edwards included an illustration and a description of a female spruce grouse in the second volume of his A Natural History of Uncommon Birds. He used the English name "The Brown and Spotted Heathcock". Edwards based his hand-coloured etching on a preserved specimen that had been sent to him in London from the Hudson Bay in Canada by a Mr Light. [4] Edwards was later sent what he assumed was a specimen of the male bird by James Isham. In 1750, he included the male bird in the third volume of his book under the English name "The Black and Spotted Heathcock". [5] When in 1758, the Swedish naturalist Carl Linnaeus updated his Systema Naturae for the tenth edition, he placed the spruce grouse with other grouse in the genus Tetrao . Linnaeus included a brief description, coined the binomial name Tetrao canadensis and cited Edwards' work. [6] The spruce grouse is now the only species placed in the genus Canachites that was introduced in 1885 by the zoologist Leonhard Stejneger. [7] [8] The genus name Canachites combines the name Canace from Greek mythology with the Ancient Greek -itēs meaning "resembling". [9]

In the first half of the 20th century, spruce grouse were classified as two separate species in the genus Canachites: spruce grouse (C. canadensis) and Franklin's grouse (C. franklinii), a position reinstated by Birdlife International in 2014. However, as of early 2021, the International Ornithological Congress (IOC) [10] , the American Ornithological Society [11] , and the Clements taxonomy [12] retain Franklin's grouse as a subspecies of spruce grouse.

The species was later moved to the genus Dendragapus, congeneric with the blue grouse with which spruce grouse often share coniferous habitats. However, spruce grouse do not have inflatable cervical sacs as in blue grouse, and the natal plumage of the two species is different. Based on its stronger resemblance to the Siberian grouse (Falcipennis falcipennis), the spruce grouse was later reclassified into the genus Falcipennis. However, taxonomic studies found this classification to be paraphyletic, with the Siberian grouse being basal to a clade containing the spruce grouse, Tetrao , and Lyrurus . Due to this, the spruce grouse was again reclassified in Canachites, bringing its taxonomy full-circle. [13]

The spruce grouse has six recognized subspecies: [8]

ImageSubspeciesDistribution
A spruce grouse sits on a tree branch near Igloo Canyon on Saturday, September 16, 2017. (a937286c-76a8-46b1-8955-2148e6ed32b3) (cropped).JPG C. c. atratus (Grinnell, 1910)southern Alaska
C. c. canadensis (Linnaeus, 1758)central Alberta to Labrador (Canada) and Nova Scotia. Introduced in Newfoundland in 1964 [14] and Anticosti Island in 1985–86. [15]
Spruce grouse at Moosehorn National Wildlife Refuge. Credit- USFWS (11713901455).jpg C. c. canace (Linnaeus, 1766)southeast Canada and northeast United States
Sprucegrouse.jpg C. c. franklinii (Douglas, 1829)southeast Alaska to northwest Wyoming and Idaho
C. c. isleibi (Dickerman & Gustafson, 1996)southeast Alaska
C. c. osgoodi (Bishop, 1900)northern Alaska

Description

Spruce grouse are 38–43 cm (15–17 in) long; males weigh 550–650 g (19–23 oz) and females 450–550 g (16–19 oz). The spruce grouse has a wingspan range of 21.5-22.6 in (54.5-57.5 cm). [16] Races vary slightly in plumage, especially in the tail pattern and in the extent of white on the underparts, but in general adult males are mainly grey above and black below, with white spots along the side, and a red patch of bare skin over the eye called the "eyebrow comb [17] ". This red eyebrow comb, should not be confused by a similar yellow marking found on other species of grouse including, but not limited to, sharp-tailed and dusky grouse. Adult females are mottled brown (red morph) or mottled grey (grey morph) with dark and white bars on the underparts. Juveniles resemble females. Females may be confused with ruffed grouse but they have a dark tail with a pale band at the end (while the reverse is true in ruffed grouse) and they do not erect their crown feathers when alarmed the way ruffed grouse do.

Spruce grouse are among the most silent of all grouse, but they nevertheless have a number of calls used to warn of predators, to repel territorial intruders, to maintain brood cohesion, or to elicit brooding. In the subspecies franklinii, territorial males are notable for their wing-clap display. At the end of a short flight through the trees, the wings are brought together over the back so as to produce two sharp claps, about 0.5 s apart, loud enough to be heard by the human ear 150 m away. These territorial displays can sometimes be elicited by similar hand clapping, and can be used to detect male territories and estimate their density. Other non-vocal sounds include soft drumming by territorial males (a sound produced by the beating wings) and a tail-swish and a whoosh produced by the tail feathers in flight.

Distribution and habitat

As a specialist of the taiga, the spruce grouse is found throughout Canada. In the United States, it is present in Alaska, northern New England, the Adirondacks in New York, northern Michigan, northeastern Minnesota, northern Wisconsin and the montane coniferous forests of Montana, Idaho, Maine, Oregon, and Washington. Spruce grouse are always associated with conifer-dominated forests, be they pine, spruce, or fir. They seem to prefer young successional stands. In summer they can be found near rich understory of blueberries and other shrub, and in winter they prefer denser stands.

The spruce grouse is essentially a permanent resident. However, in southwestern Alberta up to 35% of females and 7% of males move several kilometers (up to 11) between summer breeding sites and wintering sites. [18] [19] Similar movements have also been documented in Alaska [20] and New Brunswick (Canada). [21]

Behaviour and ecology

Immature male "hiding" in tree, Matagamasi Lake, Temagami, Ontario Spruce Grouse.jpg
Immature male "hiding" in tree, Matagamasi Lake, Temagami, Ontario

This species prefers to walk on the ground or along tree limbs rather than fly. Like other grouse, in the fall they grow "snow shoes" (short lateral extensions, or pectinations) on their toes. This increases the surface area of the toes and helps support the bird on snow and probably to grip branches as well. The pectinations are shed in the spring. Flights are usually over short distances, most commonly from the ground to a tree nearby, or vice versa. Flight can be rapid but no actual measures of velocity have been made.

Breeding

Males are promiscuous; they disperse and advertise a territory that is visited by females for mating. Females are solely responsible for the rest of the reproductive effort though males have been known to stay with young chicks and seem to aid in keeping the brood together. For a nest, they scratch a depression in the ground in a bush or under a low-lying coniferous branch or fallen tree, away from other females and from the males' territories. The nest is lined with grasses, leaves, and a few feathers. Nesting season is from early May to early July. Up to 10 eggs may be laid, the usual number being 4–7. Laying rate is 1 egg every 1.4 days. [22] Eggs are about 40 mm (1.6 in) and are tawny olive or buff, marked with blotches of brown. Incubation begins with the last egg laid and lasts about 24 days. Young are about 15 g at hatching (0.5 ounces) and they are precocial; they walk out of the nest as soon as they are dry (about 8 h after hatching). They are capable of fluttering up from the ground at 1 week of age. The brood stays together and is accompanied by the hen, who broods them all night and frequently during the day until the young are 3–5 weeks old. Brooding behaviour of the female seems to be initiated by specific calls from the chicks when they are cold. At 70–100 days of age, chicks tend to leave the group and become independent. Females breed only once a year. Most females first breed at 1 year of age, but about half the males delay establishing a territory until 2 years. The species' lifespan appears to be about 5–6 years in the wild, though one study in Southwestern Alberta has found two males and one female that lived to be at least 13 years old. [23]

Food and feeding

The staple winter food is conifer needles, clipped directly from the tree, preferably the midcrown of pines though other conifers such as spruce are exploited as well. Spruce needles are high in calcium and their increase in use by females in Spring may be related to egg production [24] In summer the birds can forage on the ground, eating berries, green plants such as blueberry leaves, fungi, and some insects. [24] In winter, when only needles are consumed, the caeca (dead-end extensions of the intestines) and ventriculus (gizzard) increase in size to support digestion. [25] The crop is also well developed: up to 45 cc of needles [26] (about 10% of body mass) can be stored in the crop at the end of the day, to be digested over the duration of the night fast. Like other birds, spruce grouse consume clay, grit or small stones to help their gizzard break down food. Chicks under 1 week old feed on insects and other arthropods, then switch to berries and fungi until the fall, when they start feeding on needles. Birds captured while on the winter diet have been maintained several months without loss of weight, on only pine needles and grit and clay taken from where they were seen consuming it. [27]

Predators

Spruce grouse eggs are taken by American red squirrels, [28] [29] gray foxes, weasels, and possibly corvids. Adults can fall prey to various hawks and owls, red foxes, American and Pacific martens, wolves, cougars, and coyotes.

Relationship with humans

This species is commonly hunted. Annual bag figures in the late 1970s were about 188,000 birds in the US and about 360,000 in Canada. [23] Even though it has been deemed of Least Concern by IUCN, in the United States this bird is a protected species according to many northern states' hunting rules. The spruce grouse is available for hunting in Alaska from August 10 - March 31 and in some regions through May 15 according to the Alaska Department of Fish and Game. Conversely, the spruce grouse is considered threatened in its southern range - being listed as Endangered in New York and Vermont, and Critically Imperiled in Wisconsin according to NatureServe. [30] In New York, the population is estimated at 175-315 individuals, with declines recorded since the 1970s. However, a management plan has been developed. [31]

Related Research Articles

<span class="mw-page-title-main">Phasianidae</span> Family of birds

The Phasianidae are a family of heavy, ground-living birds, which includes pheasants, partridges, junglefowl, chickens, turkeys, Old World quail, and peafowl. The family includes many of the most popular gamebirds. The family is a large one and includes 185 species divided into 54 genera. It was formerly broken up into two subfamilies, the Phasianinae and the Perdicinae. However, this treatment is now known to be paraphyletic and polyphyletic, respectively, and more recent evidence supports breaking it up into two subfamilies: Rollulinae and Phasianinae, with the latter containing multiple tribes within two clades. The New World quail (Odontophoridae) and guineafowl (Numididae) were formerly sometimes included in this family, but are now typically placed in families of their own; conversely, grouse and turkeys, formerly often treated as distinct families, are now known to be deeply nested within Phasianidae, so they are now included in the present family.

<span class="mw-page-title-main">Black grouse</span> Species of bird

The black grouse, also known as northern black grouse, Eurasian black grouse, blackgame or blackcock, is a large game bird in the grouse family. It is a sedentary species, spanning across the Palearctic in moorland and steppe habitat when breeding, often near wooded areas. They will spend the winter perched in dense forests, feeding almost exclusively on the needles of conifers. The black grouse is one of two species of grouse in the genus Lyrurus, the other being the lesser-known Caucasian grouse.

<span class="mw-page-title-main">American coot</span> Species of bird

The American coot, also known as a mud hen or pouldeau, is a bird of the family Rallidae. Though commonly mistaken for ducks, American coots are only distantly related to ducks, belonging to a separate order. Unlike the webbed feet of ducks, coots have broad, lobed scales on their lower legs and toes that fold back with each step to facilitate walking on dry land. Coots live near water, typically inhabiting wetlands and open water bodies in North America. Groups of coots are called covers or rafts. The oldest known coot lived to be 22 years old.

<span class="mw-page-title-main">Willow ptarmigan</span> Species of bird

The willow ptarmigan is a bird in the grouse subfamily Tetraoninae of the pheasant family Phasianidae. It is also known as the willow grouse and in Ireland and Britain, where the subspecies L. l. scotica was previously considered to be a separate species, as the red grouse. It breeds in birch and other forests and moorlands in northern Europe, the tundra of Scandinavia, Siberia, Alaska and Canada, in particular in the provinces of Newfoundland and Labrador and Quebec. It is the state bird of Alaska. In the summer the birds are largely brown, with dappled plumage, but in the winter they are white with some black feathers in their tails. The species has remained little changed from the bird that roamed the tundra during the Pleistocene. Nesting takes place in the spring when clutches of four to ten eggs are laid in a scrape on the ground. The chicks are precocial and soon leave the nest. While they are young, both parents play a part in caring for them. The chicks eat insects and young plant growth while the adults are completely herbivorous, eating leaves, flowers, buds, seeds and berries during the summer and largely subsisting on the buds and twigs of willow and other dwarf shrubs and trees during the winter.

<span class="mw-page-title-main">Western capercaillie</span> Species of bird

The western capercaillie, also known as the Eurasian capercaillie, wood grouse, heather cock, cock-of-the-woods, or simply capercaillie, is a heavy member of the grouse family and the largest of all extant grouse species. The heaviest-known specimen, recorded in captivity, had a weight of 7.2 kilograms. Found across Europe and the Palearctic, this primarily-ground-dwelling forest grouse is renowned for its courtship display. The bird shows extreme sexual dimorphism, with males nearly twice the size of females. The global population is listed as "least concern" under the IUCN, although the populations of central Europe are declining and fragmented, or possibly extirpated.

<span class="mw-page-title-main">Northern hawk-owl</span> Species of owl

The northern hawk-owl or northern hawk owl is a medium-sized true owl of the northern latitudes. It is non-migratory and usually stays within its breeding range, though it sometimes irrupts southward. It is one of the few owls that is neither nocturnal nor crepuscular, being active only during the day. This is the only living species in the genus Surnia of the family Strigidae, the "typical" owls. The species is sometimes called simply the hawk owl; however, many species of owls in the genus Ninox are also called "hawk owls".

<span class="mw-page-title-main">Tree swallow</span> Species of bird in the Americas

The tree swallow is a migratory bird of the family Hirundinidae. Found in the Americas, the tree swallow was first described in 1807 by French ornithologist Louis Vieillot as Hirundo bicolor. It has since been moved to its current genus, Tachycineta, within which its phylogenetic placement is debated. The tree swallow has glossy blue-green upperparts, with the exception of the blackish wings and tail, and white underparts. The bill is black, the eyes dark brown, and the legs and feet pale brown. The female is generally duller than the male, and the first-year female has mostly brown upperparts, with some blue feathers. Juveniles have brown upperparts, and grey-brown-washed breasts. The tree swallow breeds in the US and Canada. It winters along southern US coasts south, along the Gulf Coast, to Panama and the northwestern coast of South America, and in the West Indies.

<span class="mw-page-title-main">Black-billed cuckoo</span> Species of cuckoo

The black-billed cuckoo is a New World species in the Cuculidae (cuckoo) family. The scientific name is from Ancient Greek. The genus name, kokkuzo, means to call like a common cuckoo, and erythropthalmus is from eruthros, "red" and ophthalmos, "eye".

<span class="mw-page-title-main">Yellow-bellied sapsucker</span> Species of North American bird

The yellow-bellied sapsucker is a medium-sized woodpecker that breeds in Canada and the northeastern United States.

<span class="mw-page-title-main">Canada jay</span> Passerine bird of the family Corvidae

The Canada jay, also known as the gray jay, grey jay, camp robber, or whisky jack, is a passerine bird of the family Corvidae. It is found in boreal forests of North America north to the tree line, and in the Rocky Mountains subalpine zone south to New Mexico and Arizona. A fairly large songbird, the Canada jay has pale grey underparts, darker grey upperparts, and a grey-white head with a darker grey nape. It is one of three members of the genus Perisoreus, a genus more closely related to the magpie genus Cyanopica than to other birds known as jays. The Canada jay itself has nine recognized subspecies.

<span class="mw-page-title-main">Sandhill crane</span> Species of bird

The sandhill crane is a species of large crane of North America and extreme northeastern Siberia. The common name of this bird refers to their habitat such as the Platte River, on the edge of Nebraska's Sandhills on the American Great Plains. Sandhill cranes are known to frequent the edges of bodies of water. The central Platte River valley in Nebraska is the most important stopover area for the nominotypical subspecies, the great sandhill crane, with up to 450,000 of these birds migrating through annually.

<span class="mw-page-title-main">Broad-winged hawk</span> Species of bird

The broad-winged hawk is a medium-sized hawk of the genus Buteo. During the summer, some subspecies are distributed over eastern North America, as far west as British Columbia and Texas; they then migrate south to winter in the Neotropics from Mexico south to southern Brazil. Other subspecies are all-year residents on Caribbean islands. As in most raptors, females are slightly larger than males. Broad-winged hawks' wings are relatively short and broad with a tapered, somewhat pointed appearance. The two types of coloration are a dark morph with fewer white areas and a light morph that is more pale overall. Although the broad-winged hawk's numbers are relatively stable, populations are declining in some parts of its breeding range because of forest fragmentation.

<span class="mw-page-title-main">Blackburnian warbler</span> Species of bird

The Blackburnian warbler is a small New World warbler. They breed in eastern North America, from southern Canada, westwards to the southern Canadian Prairies, the Great Lakes region and New England, to North Carolina.

<span class="mw-page-title-main">Magnolia warbler</span> Species of bird

The magnolia warbler is a member of the wood warbler family Parulidae.

<span class="mw-page-title-main">Siberian grouse</span> Species of bird

The Siberian grouse, also known as Siberian spruce grouse, Amur grouse, or Asian spruce grouse, is a short, rotund forest-dwelling grouse. A sedentary, non-migratory bird, it is the only member of the genus Falcipennis. The spruce grouse of North America, which physically looks similar, is now placed in the monotypic genus Canachites.

Gamebird hybrids are the result of crossing species of game birds, including ducks, with each other and with domestic poultry. These hybrid species may sometimes occur naturally in the wild or more commonly through the deliberate or inadvertent intervention of humans.

<span class="mw-page-title-main">Szechenyi's monal-partridge</span> Species of bird

Szechenyi's monal-partridge, also known as buff-throated partridge or buff-throated monal-partridge, is a member of the family Phasianidae in the order Galliformes. They are endemic to western China.

<span class="mw-page-title-main">Sooty grouse</span> Species of bird

The sooty grouse is a species of forest-dwelling grouse native to North America's Pacific Coast Ranges. It is closely related to the dusky grouse, and the two were previously considered a single species, the blue grouse.

<span class="mw-page-title-main">Alberta–British Columbia foothills forests</span> Temperate coniferous forests ecoregion of Alberta and British Columbia, Canada

The Alberta–British Columbia foothills forests are a temperate coniferous forests ecoregion of Western Canada, as defined by the World Wildlife Fund (WWF) categorization system. This ecoregion borders Canada's taiga and contains a mix of subarctic forest and temperate forest species as a result. This makes the region an ecotone region, or a region that acts as a buffer between two other biomes.

<span class="mw-page-title-main">Franklin's grouse</span> Species of bird

Franklin's grouse is a subspecies of the spruce grouse found in the Northwest Territories, British Columbia, and Alberta.

References

  1. BirdLife International (2014). "Falcipennis canadensis". IUCN Red List of Threatened Species . 2014. Retrieved 3 January 2015.
  2. Webster's New International Dictionary (2 ed.). Springfield, Massachusetts: Marriam-Webster. 1943. p. 982.
  3. Random House unabridged dictionary (2nd ed.). New York: Random House. 1993. p. 746. ISBN   0-679-42917-4.
  4. Edwards, George (1747). A Natural History of Uncommon Birds. Vol. Part II. London: Printed for the author at the College of Physicians. p. 71, Plate 71.
  5. Edwards, George (1750). A Natural History of Uncommon Birds. Vol. Part III. London: Printed for the author at the College of Physicians. p. 118, Plate 118.
  6. Linnaeus, Carl (1758). Systema Naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis (in Latin). Vol. 1 (10th ed.). Holmiae (Stockholm): Laurentii Salvii. p. 159.
  7. Stejneger, Leonhard (1885). "Notes on some apparently preoccupied ornithological generic names". Proceedings of the United States National Museum. 8 (26): 409–410 [410]. doi:10.5479/si.00963801.530.409.
  8. 1 2 Gill, Frank; Donsker, David; Rasmussen, Pamela, eds. (July 2021). "Pheasants, partridges, francolins". IOC World Bird List Version 11.2. International Ornithologists' Union. Retrieved 13 October 2021.
  9. Jobling, James A. (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. p. 87. ISBN   978-1-4081-2501-4.
  10. Gill, F.; Donsker, D.; Rasmussen, P. (January 2021). "IOC World Bird List (v 11.1)" . Retrieved January 14, 2021.
  11. "Check-list of North and Middle American Birds". American Ornithological Society. June 30, 2020. Retrieved July 1, 2020.
  12. Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2019. The eBird/Clements Checklist of Birds of the World: v2019. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/ March 5, 2021
  13. "Taxonomic Updates – IOC World Bird List" . Retrieved 2021-07-14.
  14. Tuck, L.M. (1968). Recent Newfoundland bird records. Auk 85:304-311.
  15. Lemay, Y. (1989). Charactérisation de l'habitat de reproduction du tétras du Canada (Dendragopus canadensis) sur l'Ile d'Anticosti. MSc thesis, Université du Québec à Trois-Rivières.
  16. "Spruce Grouse Identification, All About Birds, Cornell Lab of Ornithology". www.allaboutbirds.org. Retrieved 2020-09-26.
  17. "Spruce Grouse". Cornell Lab of ornithology; All about birds. Retrieved 11 October 2019.
  18. Schroeder, M.A. (1985). Behavioural differences of female Spruce grouse undertaking short and long migrations. Condor 85:281-286.
  19. Schroeder, M.A., and D.A. Boag (1987). "Dispersal in Spruce grouse: is inheritance involved?" Animal Behaviour 36: 305-307.
  20. Ellison, L.N. (1973)." Seasonal social organization and movements of Alaskan Spruce Grouse." Condor 75:375-385.
  21. Herzog, P.W., and D.M. Keppie (1980). "Migration in a local population of Spruce Grouse." Condor 82:366-372.
  22. McCourt, K.H., D.A. Boag, and D.M. Keppie (1973). "Female Spruce Grouse activities during laying and incubation." Auk 90:619-623.
  23. 1 2 Boag, D.A. and M.A. Schroeder (1992). Spruce Grouse. In The Birds of North America, No.5 (A, Poole, P. Stettenheim, and F. Gill, eds.), Philadelphia: The Academy of Natural Sciences; Washington, DC: The American Ornithologists' Union.
  24. 1 2 Pendergast, B. A.; Boag, D. A. (1971). "Nutritional Aspects of the Diet of Spruce Grouse in Central Alberta". The Condor. 73 (4): 437–443. doi:10.2307/1366665. JSTOR   1366665.
  25. Pendergast, B.A.; Boag, D. A. (1973). "Seasonal Changes in the Internal Anatomy of Spruce Grouse in Alberta". The Auk. 90 (2): 307–317.
  26. Ellison, L.N. (1966). Seasonal foods and chemical analysis of winter diet of Alaskan spruce grouse. Journal of Wildlife Management 30:729-735.
  27. Pendergast, B.A. and D.A. Boag (1971). "Maintenance and Breeding of spruce Grouse in Captivity" Journal of Wildlife Management 35(1):177-179.
  28. Boag, D.A., S.G. Reebs, and M.A. Schroeder (1984). Egg loss among Spruce Grouse inhabiting lodgepole pine forests. Canadian Journal of Zoology 62:1034–1037.
  29. Robinson, W.L. (1980). Fool Hen: the Spruce Grouse on the Yellow Dog Plains. Madison: University of Wisconsin Press.
  30. "NatureServe Explorer 2.0". explorer.natureserve.org. Retrieved 16 November 2022.
  31. DEC, NYS. "Spruce Grouse - NYS Dept. of Environmental Conservation". www.dec.ny.gov. Retrieved 16 November 2022.