Bird

Mallard Duck

Anas platyrhynchos
Bird Along the Missouri River New to Western Science
Mallard Duck

Photo: Richard Bartz, CC BY-SA 2.5

Common Names
Common Mallard, Wild Duck, Green-head
Habitat
Rivers, lakes, wetlands, and marshes along the entire expedition route
First Observed
1804-07-04
Observed At
Along the Missouri River

Ducks were among the most frequently mentioned waterfowl in the expedition journals, observed along virtually every waterway. Lewis and Clark noted multiple species but most commonly encountered the mallard. Ducks served as a supplemental food source and were often mentioned alongside geese, pelicans, and other waterfowl in the daily wildlife observations.

Recent sightings

Where it’s being seen today

96 research-grade iNaturalist observations between 2015–2026. Most recent: 2026-04-01. Sourced from Terrain360 trail captures, cached locally.

Journal References

15 journal entries mention Mallard Duck

Apr 9 1805
Departure from Fort Mandan, Missouri River — John Ordway: April 9, 1805
...nomber of wild geese on the River & brants flying over Some ducks, the Musquetoes begin to Suck our blood this afternoon, we camped at the upper end of a bottom on ...
Apr 16 1805
Lewis: April 16, 1805
...both in the plains and on the riverI have observed but few ducks, those we have met with are the Mallard and blue winged Teal
Jun 26 1805
Great Falls Portage — John Ordway: June 26, 1805
...ouse. Wheeler identifies it as either modern Confederate or Duck Creek, the two flowing into the Missouri almost 252 WISCONSIN HISTORICAL COLLECTIONS [July 24 passe...
Jul 27 1805
Lewis: July 27, 1805
... each 90 yds. wide. in these meadows I saw a number of the duckanmallad with their young which are now nearly grown. Currants of every species as well as goosberr...
Jul 29 1805
Lewis: July 29, 1805
...eft the falls of the Missouri. we have not seen the summer duck since we left that place, nor do I beleive that it is an inhabitant of the Rocky mountains. the Du...
Aug 2 1805
Lewis: August 2, 1805
...ber of beaver dams and the inhabitants of them, many young ducks both of the Duckanmallard and the redheaded fishing duck, gees, several rattle snakes, black woo...
Aug 4 1805
Jefferson River ascending toward divide — Joseph Whitehouse: August 4, 1805
...er on the River as below. proceeded on killed a goose and a duck. they are pleanty on the River. we Came 15 miles this day and Camped at a bottoms covered with dry ...
Aug 8 1805
Jefferson/Beaverhead River near present-day Dillon — John Ordway: August 8, 1805
...ught us a deer which he had killed. Saw a nomber of geese & ducks on the River, passed beautiful prarie on each Side covred with high grass thissels Sun flowers Som...
Aug 25 1805
Lewis: August 25, 1805
...hrough the Shoshone cove Frazier fired his musquet at some ducks in a little pond at the distance of about 60 yards from me; the ball rebounded from the water and...
Sep 2 1805
North Fork Salmon River, impassable route — Patrick Gass: September 2, 1805
...GASS'S JOURNAL OF THE forenoon we killed some pheasants and ducks, and a small squirrel. In the afternoon we had a good deal of rain, and the worst road (if road it...
Sep 9 1805
Travelers' Rest near present-day Lolo, MT — Joseph Whitehouse: September 9, 1805
...hunters all but one joined us had killed 3 Deer and Several ducks this day &c. course N. W. and North all day. 1805] WHITEHOUSE’S JOURNAL
Sep 9 1805
Travelers' Rest near present-day Lolo, MT — John Ordway: September 9, 1805
...he horses bellys. our hunters killed three deer and several ducks this day we Camped 1 "of which there are a large number, the valley being abundantly watered on ei...
Oct 12 1805
Snake River rapids, near Lewiston — Patrick Gass: October 12, 1805
...n a small canoe, and acted as pilots or guides. We saw some ducks and a few geese, but did not kill any of them. There is no four-footed game of any kind near this ...
Oct 14 1805
Clark: October 14, 1805
...plaines on each Side is wavering. Labiesh killed 2 gees & 2 Ducks of the large kind. at two oClock we loaded & Set out, our Powder & Provisions of roots not Suffi...
Oct 14 1805
Snake River rapids, near Lewiston — Patrick Gass: October 14, 1805
... bad, but we got over without injury. We saw some geese and ducks this forenoon and killed some of the ducks. About 1 o’clock a canoe hit a rock, and part of her ...

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