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Are There American White Pelicans in Colorado?

Yes, American White Pelicans breed at select Colorado reservoirs, primarily in the western part of the state. These massive waterbirds arrive in spring to establish nesting colonies at shallow inland lakes. Most birds depart by autumn, heading to coastal wintering areas in California and Mexico.

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By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 21, 2026.

American White Pelican photographed in Colorado

American White Pelican · Jes Gray CC BY

American White Pelican photographed in Colorado

American White Pelican · Jared Lincenberg CC BY

American White Pelican photographed in Colorado

American White Pelican · Jared Lincenberg CC BY

Photos by iNaturalist observers, reused under the licence each observer chose.
Found in Colorado
174,431
GBIF records
6
birding hotspots

Yes, american white pelicans are in Colorado. Next you'll want:

Yes, American White Pelicans breed at select Colorado reservoirs, primarily in the western part of the state. These massive waterbirds arrive in spring to establish nesting colonies at shallow inland lakes. Most birds depart by autumn, heading to coastal wintering areas in California and Mexico.

Where American White Pelicans Are Found in Colorado

American White Pelicans breed at specific Colorado reservoirs, with major colonies on islands at lower elevation water bodies in western Colorado. McPhee Reservoir near Cortez hosts significant breeding populations. Parachute Reservoir and other western Slope reservoirs provide nesting habitat. The lower Colorado River drainages offer feeding areas for breeding and migrating birds. Eastern plains reservoirs including Bonny Reservoir occasionally host migrants and nonbreeders. Visit/wildlife/coloradoto learn about Colorado's diverse wildlife. Pelicans prefer large, undisturbed reservoirs with adequate food supplies. Breeding colonies occupy remote islands inaccessible to most visitors. Mountain lakes at high elevation rarely host pelicans except during migration. Migrants funnel through Colorado following river valleys and major reservoirs. The state's location on the western migration corridor makes it important for northbound spring migrants and southbound fall birds. Pelicans concentrate where abundant fish populations support their dietary needs. Seethe American White Pelican guide for Coloradofor more.

Season and Timing in Colorado

American White Pelicans arrive in Colorado beginning in March and April, establishing breeding colonies quickly once water levels permit. Eggs appear by late April and May. Young birds fledge by July and August. Most adults and young pelicans depart by September and October for southern wintering areas. A few nonbreeding birds may remain into November in open water. Timing coincides with snowmelt and increasing water levels on Colorado reservoirs. Early spring floods may impact nesting attempts on low islands. Late-season cold snaps can freeze water bodies, forcing pelican departures. Reservoir water levels fluctuate significantly based on irrigation demands and snowmelt. High water years often result in more successful breeding than drought years. Spring migration timing depends partly on ice conditions on breeding lakes further north. Fall migration timing correlates with cooling temperatures and decreasing fish availability in Colorado.

Identifying American White Pelicans

American White Pelicans are massive waterbirds with predominantly white plumage and black wing tips. The most diagnostic feature is an enormous bill measuring up to seventeen inches long with a large throat pouch for catching fish. During breeding season, bills develop brilliant orange and red coloration with a prominent knob on the upper mandible. Outside breeding season, bills appear more yellow and pink. Pelicans measure eight to ten feet long with wingspans reaching nine and a half feet. Males are significantly larger than females. In flight, the contrast between white body and black wing tips is striking. The extended neck in flight helps distinguish pelicans from other large waterbirds. Young birds appear dusky white to pale brown with pinkish bills. Immatures gradually acquire adult white plumage over their first two years of life.

Where Pelican Sightings Concentrate in Colorado

Breeding colonies concentrate on remote islands in western Colorado reservoirs, particularly McPhee Reservoir. Lower Colorado River sections adjacent to breeding colonies attract feeding flocks. Parachute Reservoir and nearby water bodies host pelicans seasonally. Eastern plains reservoirs including Bonny Reservoir and Jumbo Reservoir occasionally attract migrants. The Colorado River and associated backwater areas provide migration corridors and feeding habitat. Mountain reservoirs above eight thousand feet rarely attract more than vagrant birds. South Platte River drainages concentrate eastbound migrants. High mountain passes funnel migrating birds seeking lower elevation. Visit/wildlifefor information about wildlife viewing ethics and protected area regulations. Access to most breeding colonies is restricted to protect nesting birds. Viewing from distance with binoculars or spotting scopes offers the best observation approach. Peak sightings occur April through May during spring breeding season establishment and July through September during migration periods.

Behavior and Diet of Pelicans

American White Pelicans are highly social birds that often breed in colonies and feed cooperatively. They consume four to five pounds of fish daily, feeding on species available in Colorado reservoirs including carp, tilapia, and native fish populations. Pelicans feed by dipping bills into water while swimming rather than diving. Coordinated feeding groups sometimes herd fish into concentrated areas for easier capture. Early morning and late afternoon provide peak feeding times. Pelicans rest on water and shore areas throughout the day between feeding bouts. Flight is strong and efficient, pelicans often soaring on thermals to conserve energy. Breeding adults perform elaborate courtship displays including synchronized bowing and head throwing. Parents regurgitate fish for hungry chicks multiple times daily. Vocalizations include grunts and hisses at breeding colonies but birds are generally quiet during migration.

Coexistence and Safety

American White Pelicans are protected under the Migratory Bird Treaty Act, making any harm or harassment illegal. These birds pose no threat to humans. Fishing interests sometimes express concern about pelican fish consumption, but pelicans typically consume forage species not targeted by anglers. Colorado Parks and Wildlife manages pelican populations and ensures legal protection. Most breeding colonies are located on islands or in restricted areas minimizing human conflict. Reservoir operations may affect pelican breeding success depending on water level changes. Respect all posted closures around known breeding sites. Disturbed adults abandon nests, exposing eggs and chicks to predation and weather exposure. Never attempt to land on islands or approach nesting birds. Visit/wildlife/coloradofor current regulations and responsible wildlife viewing guidelines for observing these magnificent birds.

Species Commonly Confused with American White Pelicans

Great Egrets are white and long-necked but far more slender and lack the massive pelican bill. Snowy Egrets are small white herons with no resemblance to pelicans. Mute Swans occasionally appear on Colorado reservoirs but are swans with different body shapes and behaviors. Trumpeter Swans and Whistling Swans are white but are waterfowl with swan bills and behaviors. Ring-billed Gulls and Herring Gulls are large and white but lack the bulk and distinctive bill of pelicans. Double-crested Cormorants are diving birds with dark plumage and different proportions. Wood Storks are rare in Colorado and show white plumage but have dark heads and smaller bills. Whooping Cranes are rare in Colorado but white and tall with different body shapes. The enormous bill, massive body size, and distinctive white and black flight pattern make American White Pelicans immediately recognizable.

Frequently Asked Questions

Do American White Pelicans stay year-round in Colorado? No, they breed spring through summer and depart in fall for southern wintering grounds. A few nonbreeders may linger into November. Why do pelicans need such large bills? The throat pouch beneath the bill is used to scoop and carry fish up to four pounds daily. Bills are also used for displays during breeding season. How many chicks do breeding pelicans raise? American White Pelicans typically raise one to three chicks per nest each breeding season. What should I do if I find an injured pelican? Contact Colorado Parks and Wildlife or a local wildlife rehabilitation center immediately for assistance. Visit/wildlife/coloradofor agency contact information and wildlife viewing guidelines.

Plan your american white pelican sighting in Colorado

174,431 verified american white pelican records have been logged in Colorado, most recently in 2026. See the GBIF records.

Where to look in Colorado

Birding hotspots via eBird (Cornell Lab).

Recent american white pelican sightings

  • Ryan Gulch Reservoir · 2026-07-20 19:53 · 6 seen
  • Cherry Creek SP--Prairie Loop · 2026-07-20 19:06
  • Rocky Mountain Arsenal NWR--Lower Derby Lake · 2026-07-20 17:52 · 48 seen
  • Union Reservoir South Shore · 2026-07-20 16:28 · 1 seen
  • Baseline Reservoir · 2026-07-20 16:23 · 39 seen

Planning a trip to see american white pelican? Find places to stay near Bent's Old Fort National Historic Site on Booking.com.

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