Nighthawk Feeding Habits: What They Eat and How They Hunt

What Do Nighthawks Eat?

Nighthawks are aerial insectivores, meaning they feed almost exclusively on flying insects captured in flight. Their diet includes a wide range of insects, such as moths, beetles, flying ants, mayflies, caddisflies, grasshoppers, crickets, and occasionally mosquitoes. The Common Nighthawk, the most widespread species in North America, has been documented eating dozens of insect families. They tend to prefer larger, soft-bodied insects like moths and June beetles, but they are opportunistic and will take whatever is abundant during their active feeding periods.

Because they feed on the wing, nighthawks consume insects that are active at the same times they are—primarily at dusk and dawn, and sometimes during the day in cloudy weather or near bright lights that attract insects. They rarely, if ever, feed on the ground, and they drink by skimming the surface of water in flight.

How Do Nighthawks Hunt?

Nighthawks are masters of aerial foraging. They hunt in open airspace, often over fields, wetlands, rivers, and urban areas where flying insects are concentrated. Their hunting strategy relies on their large, wide mouths, which are adapted for scooping insects from the air. The mouth is bordered by stiff bristles that help funnel prey inward, much like a net. They fly with erratic, bat-like maneuvers, twisting and turning to intercept insects.

A nighthawk’s eyes are large and well-adapted for low-light conditions, allowing them to spot prey in dim light. They typically hunt at heights from just above the ground to over 100 feet, depending on where insects are flying. When prey is abundant, they may feed continuously for extended periods, especially during the crepuscular hours.

Aerial Foraging Techniques

Nighthawks employ several techniques during aerial foraging:

• Continuous hawking: Flying with their mouths open, they sieve insects from the air as they travel.
• Sallying: From a perch or while flying, they make short, rapid dashes after individual insects.
• Feeding near lights: They are often seen around stadium lights, streetlights, and other artificial lights that attract swarms of insects, making foraging easier.

When you observe nighthawks at dusk, you may notice their characteristic bounding flight with deep wingbeats followed by glides. They often call with a nasal “peent” while foraging, helping you track their presence even in fading light.

When Are Nighthawks Most Active for Feeding?

Nighthawks are primarily crepuscular, meaning they are most active at dawn and dusk. Feeding at dusk is a key behavior to observe. They begin foraging as the light fades, taking advantage of the peak activity of many flying insects. On moonlit nights, they may continue feeding well after dark, and during breeding season, they may also feed during the day, especially when feeding young.

In late summer, Common Nighthawks may gather in large flocks during migration and feed heavily in the evenings to fuel their long journey to South America. Watching a sky full of nighthawks swooping over a river or prairie at dusk is a memorable experience.

Observing Nighthawk Feeding in the Field

To observe nighthawk feeding habits, plan your outing for the hour before sunset. Look for them over open areas: grasslands, lakeshores, gravel rooftops, or recently burned prairies. They are often easiest to spot against the twilight sky. Bring binoculars, but you may be able to see them with the naked eye due to their size and distinct flight pattern.

Practical Tips for Your Next Outing

1. Time your visit: Arrive at your chosen spot at least 30 minutes before sunset. Nighthawks typically become active as the light dims.
2. Choose the habitat: Open areas with water or fields are ideal. In urban settings, watch near bright lights or over gravel rooftops.
3. Listen for calls: The nasal “peent” is a giveaway. Once you hear it, scan the sky for their erratic flight.
4. Watch for feeding swarms: If you see a swarm of insects, nighthawks may be nearby, capitalizing on the abundance.
5. Be patient and still: Nighthawks are not shy, but sudden movements can disturb them. Enjoy the quiet observation.

Seasonal Changes in Nighthawk Diet

Nighthawk diet varies with season and region, reflecting the availability of flying insects. In early spring, they may feed on early-emerging moths and beetles. By summer, a wider variety of insects is available, including grasshoppers and flying ants. During migration, they may feed on high-altitude insect concentrations. Because they are dependent on flying insects, they are vulnerable to cold snaps that reduce insect activity, which can delay nesting or force them to move.

Climate and weather also influence feeding. Windy nights may ground insects, making foraging difficult, while warm, humid evenings often produce abundant insect flights. Rainfall can also wash insects from the air, so nighthawks may feed more heavily before storms or on clearing evenings.

Supporting Nighthawks and Their Insect Prey

Supporting nighthawks means supporting healthy insect populations. Reducing pesticide use, preserving natural areas, and protecting wetlands and grasslands are critical. Creating gravel patches or installing rooftop gravel can provide nesting habitat in urban areas. Turning off unnecessary outdoor lights can reduce light pollution, but nighthawks may actually benefit from some lights that concentrate insects—however, these lights can disrupt other wildlife. The best approach is to encourage natural insect abundance through native plantings and avoiding chemicals.

By understanding nighthawk feeding habits, you deepen your appreciation for these elegant birds and the complex ecosystems that sustain them. Every dusk outing offers a chance to witness the quiet drama of aerial foraging, a reminder of the delicate balance of the natural world.

Comparison: Nighthawk Diet vs. Other Nightjars

This table illustrates how nighthawks differ from related nightjars in diet and foraging strategy, reflecting their adaptation to open habitats and crepuscular activity.