Bird

Greater Sage-Grouse

Centrocercus urophasianus
Bird Near the mouth of the Marias River, Chouteau County, Montana New to Western Science
Greater Sage-Grouse

Photo: Bureau of Land Management, Public domain

Common Names
Cock of the Plains
Habitat
Sagebrush steppe of the intermountain West
First Observed
1805-06-06
Observed At
Near the mouth of the Marias River, Chouteau County, Montana

Lewis first observed the greater sage-grouse on June 6, 1805, near the mouth of the Marias River in Montana. He wrote one of the most detailed ornithological descriptions of the expedition at Fort Clatsop on March 2, 1806, calling it the “cock of the plains.” His description was so thorough and accurate that it rivals the work of professional ornithologists of the era. The species is now threatened due to sagebrush habitat loss across the American West.

Journal Excerpt

Lewis, March 2, 1806: "the Cock of the Plains is found in the plains of Columbia, and are in Great abundance from the entrance of the S.E. fork of the Columbia to that of Clark's river… this is a large bird about 2/3 the size of a turkey… the colour is an uniform mixture of dark brown reather bordoring on a dove colour, redish and yellowish brown."

Journal References

15 journal entries mention Greater Sage-Grouse

Sep 17 1804
Lewis: September 17, 1804
Monday September 17th 1804. Having for many days past confined myself to the boat, I determined to devote this day to amuse myself on shore...
Jun 5 1805
Lewis: June 5, 1805
Wednesday June 5th 1805. This morning was cloudy and so could that I was obleged to have recourse to a blanket coat in order to...
Jul 5 1805
Lewis: July 5, 1805
Friday July 5th 1805. This morning I had the boat removed to an open situation, scaffold her off the ground, turned her keel to the...
Aug 20 1805
Lewis: August 20, 1805
...ght; this indian gave them three salmon. Capt. C. killed a cock of the plains or mountain cock. it was of a dark brown colour with a long and pointed tail larger than the dungh...
Aug 25 1805
Lewis: August 25, 1805
... this cove. I also saw several large hares and many of the cock of the plains. Capt. Clark set out early this morning and continued his rout to the indian camp at the entrance ...
Dec 9 1805
Clark: December 9, 1805
December 9th Monday 1805 rained all the last night we are all wet, Send 2 men in pursute of the Elk & with the other...
Mar 1 1806
Clark: March 1, 1806
Saturday March the 1st 1806 This morning we despatched Sergt. Gass with 12 men in two Canoes in quest of the Elk which had been...
Mar 2 1806
Clark: March 2, 1806
... feasted on the Anchovies and wappatoe.-. The Heath Cock or cock of the Plains is found in the Plains of Columbia and are in great abundance from the enterance of Lewis's river ...
Mar 2 1806
Lewis: March 2, 1806
...hel of Wappetoe. we feasted on Anchovies and Wappetoe. The Cock of the Plains is found in the plains of Columbia and are in Great abundance from the entrance of the S. E. fork ...
Mar 4 1806
Clark: March 4, 1806
Tuesday March 4th 1806 Not any accurrance to day worthy of notice. we live Sumptiously on our wappatoe and Sturgeon. the Anchovey is so delicate...
Mar 4 1806
Lewis: March 4, 1806
Tuesday March 4th 1806. Not any occurrence today worthy of notice. we live sumptuously on our wappetoe and Sturgeon. the Anchovey is so delicate that...
Mar 12 1806
Lewis: March 12, 1806
Wednesday March 12th 1806 We sent a party again in surch of the perogue but they returned unsuccessful) as yesterday. Sent one hunter out on...
Apr 5 1806
Clark: April 5, 1806
Saturday April 5th 1806. This morning was So Cloudy that we could not obtain any lunar observations with a Aquila as we wished. Joseph Field...
May 1 1806
Clark: May 1, 1806
Thursday May 1st 1806. This morning we collected our horses and made an early Start, haveing preveously Sent a hed 4 hunters with derections to...
Jul 1 1806
Lewis: July 1, 1806
Tuesday July 1st 1806. This morning early we sent out all our hunters. set Sheilds at work to repair some of our guns which were...

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