Left: female Mallard preening in the water. Right: male Mallard in water.
Left: female Mallard preening. Right: male Mallard

NPS Photo / Rachel Ames

Size: 19.5-25.5”
Description: Males have a gray body; brown breast; black rear; a dark, iridescent-green head; narrow white throat band, and bright yellow bill. Females and juveniles are mottled brown with orange and brown bills. Both sexes have a white-bordered blue speculum patch on the wing.
Migratory Status: Spring, summer and fall residents of Rocky Mountain National Park.
Habitat: Live in all types of wetland habitats including ponds, lakes, reservoirs, marshes and rivers to 9,000 feet and occasionally 11,000 feet.
Diet: Forage by dabbling in the water and surrounding shores, and eat a wide variety of aquatic vegetation, seeds and insects.

Last updated: June 8, 2018

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Mailing Address:

1000 US Hwy 36
Estes Park, CO 80517


(970) 586-1206
Through winter, the Information Office is open 8:00 am–4:30 pm Mon–Fri. Recorded Trail Ridge Road status: (970) 586-1222.

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