Watching Cormorants on Prairie Lakes
Learn where and how to observe Double-crested Cormorants on prairie lakes, from feeding behavior and nesting colonies to roosting sites and seasonal changes, with practical tips for birdwatchers.
Contents
- Identifying the Double-crested Cormorant
- Why Prairie Lakes Attract Cormorants
- Feeding Behavior: Diving and Drying
- Nesting Colonies and Roosting Sites
- Seasonal Patterns on the Prairie
- Field Notes: Equipment and Etiquette
- How to Find Cormorants on a Prairie Lake
- Understanding What You See
- Respect for Birds and Habitat
To watch cormorants on prairie lakes, visit from spring through fall, look for dark birds with long necks and hooked bills, and scan for their distinctive low flight and upright drying posture. Prairie lakes—often shallow, windswept, and rich in fish—host Double-crested Cormorants throughout the warmer months. Patient observers can witness their feeding dives, communal nesting, and daily roosting routines.
Identifying the Double-crested Cormorant
The Double-crested Cormorant is a large, dark waterbird with a slender body, a long neck, and a hooked bill. Adults are glossy black with a small orange patch near the bill; breeding birds show a short tuft of feathers on each side of the head. Young birds are browner with pale necks and bellies. At a distance, they may be confused with loons or grebes, but cormorants often sit lower in the water and hold their bills tilted slightly upward.
Why Prairie Lakes Attract Cormorants
Prairie lakes offer what cormorants need: clear, shallow water for fishing, isolated islands or dead trees for safe resting, and nutrient-rich conditions that support fish populations. Many prairie lakes are lake habitat with gradual shorelines and wind-driven currents that concentrate small fish, making it easier for cormorants to hunt.
Feeding Behavior: Diving and Drying
Cormorants are pursuit divers. They spot fish from the surface, then plunge and propel themselves with webbed feet, often surfacing far from where they dove. After a bout of feeding, cormorants perch on rocks, logs, or mudflats and spread their wings wide to dry their feathers—cormorant feathers are less waterproof than those of ducks, which helps them dive but requires regular drying. Watch for birds repeatedly diving in a small area; this often means a school of small fish is present.
Nesting Colonies and Roosting Sites
From mid-spring onward, cormorants gather in nesting colonies, often on small islands or in flooded timber. Nests are bulky platforms of sticks, lined with grass or aquatic plants, placed in trees, shrubs, or on bare ground. Colonies can range from a few pairs to hundreds, and the noise and odor can be noticeable from a distance. Cormorants also use roosting sites—specific perches such as dead snags, sandbars, or rocky points—where they rest and dry their wings outside the breeding season. Respect posted signs and avoid disturbing these roosts, especially during late summer when young birds are learning to fly.
Seasonal Patterns on the Prairie
Spring brings the first arrivals, often in April, when ice has gone. Courtship displays include wing-waving, neck-stretching, and mutual preening. Summer is the best time to watch feeding trips and colony activity. By late summer, young birds fledge and families disperse to larger lakes. In fall, cormorants gather in loose flocks and migrate south, though a few may linger until freeze-up. Keep a simple journal: note arrival dates, colony locations, and feeding hotspots—patterns often repeat year to year.
Field Notes: Equipment and Etiquette
You need only a pair of binoculars (8x or 10x), a notebook, and patience. A spotting scope helps at large lakes. Wear muted clothing and avoid sudden movements. Keep at least 200 yards between you and active nests or roosts; use a car or natural cover as a blind. Early morning and late afternoon are often best for feeding activity, while midday can be a time for wing-drying and loafing.
How to Find Cormorants on a Prairie Lake
- Choose a lake with shallow bays or islands. Check maps or local birding reports for known cormorant sites.
- Arrive early or stay late. Cormorants are most active in low light, and wind is often calmer.
- Scan the horizon first. Look for long, low lines of birds flying with steady wingbeats and occasional glides.
- Check exposed perches. Dead trees, rocks, and buoys are favorite drying spots.
- Watch for repeated dives. A bird that surfaces, dives again, and often changes direction is likely feeding.
Understanding What You See
Common observations and their likely meanings:
| Observation | Likely Explanation |
|---|---|
| Bird holds wings open, motionless | Drying feathers after a dive; may also aid digestion by warming the body |
| Bird repeatedly dives in one small area | Actively hunting a school of fish |
| Birds flying in a V or straight line | Moving between feeding and roosting areas |
| Loud, guttural calls at a colony | Adults greeting mates or warning intruders; young begging for food |
Respect for Birds and Habitat
Give cormorants space. If birds flush from a roost or nest, you are too close. Avoid boating near colony islands and keep dogs leashed. Never feed cormorants; human food can harm them. Carry out all trash, especially fishing line, which can entangle birds. Remember that prairie lakes are shared with other wildlife—herons, grebes, terns, and waterfowl—so move slowly and quietly.
By watching patiently and recording what you see, you become part of a long tradition of prairie naturalists. Cormorants on prairie lakes are a living reminder of the region's wild rhythms—best appreciated unhurried, with open eyes and a quiet step.