What Do Killdeer Eat? The Ultimate Diet Guide

If you've ever seen a killdeer dart across a gravel driveway, halt abruptly, and then probe the dirt with its beak, you might have wondered what it was discovering. The short answer: not much that you'd think a "typical" backyard bird would eat. Killdeer don't even bother with the seed feeder and instead base their entire diet on bugs, worms and whatever small creature is unlucky enough to be moving through the grass at the wrong moment.

Killdeer (Charadrius vociferus) are almost exclusively insectivorous. They feed on beetles, grasshoppers, caterpillars, earthworms, snails and other invertebrates that they pick from short grass, mudflats, ploughed fields and gravel. Plant material and seeds are a tiny part of their diet, and these are usually eaten incidentally, rather than as a conscious choice of food.

Like all plovers, killdeer belong to the plover family and hunt by sight, not by probing blindly, as woodcocks and snipes do. That single fact dictates almost everything that winds up on the menu.

Killdeers feed almost exclusively on animal matter, about 98 to 99 per cent of their diet. Beetles are at the top of the list: Ground beetles, weevils, and click beetles are all potential prey. Open fields are the scene of the chase of grasshoppers and crickets. Caterpillars, ants, flies and spiders complete the insect contingent. In moist soil, killdeer will also work over earthworms, snails and small crustaceans, and on the shore, they will pick off minute crabs and aquatic insect larvae.

In fact, farmers have relied on these birds for over a century. Killdeer have gained a reputation for ridding cotton fields of weevils and other crop pests, making them one of the more beneficial "volunteer" birds on agricultural land.

Killdeer are not built to be seed eaters, but some plant material—waste grain, weed seeds, bits of vegetation—does end up in their stomachs. Researchers who have examined killdeer stomach contents usually find seeds in less than 5 per cent of samples, usually in small amounts mixed in with insect remains. It's opportunistic, not a food they hunt.

This limitation poses a challenge for many backyard birders. Killdeer are not designed to crack seed hulls; their short, straight bills are for picking, not the kind of seed-crushing a cardinal or finch easily does. That's why you will rarely see a killdeer land on a platform feeder or peck at a seed pile like sparrows and finches.

If a killdeer does swallow a stray sunflower seed or bit of millet that has fallen on the ground near a feeder, it is incidental; the bird was probably hunting for insects hiding in the spilt seed, not the seed itself. If you want killdeer hanging around, forget the feeder altogether and focus on open ground. That's the good stuff.

Watch a killdeer hunt for food for thirty seconds, and the same pattern will come up: run, stop, tilt the head, peck, run again. This run-stop-peck style is typical of plovers, and it is very efficient. The pause allows the bird time to visually scan the ground for movement—a beetle shifting, a worm surfacing—before it commits to a strike.

Killdeer are diurnal foragers and often flock loosely outside the breeding season. They are not particular about habitat as long as the ground is open. Killdeer can be found in various environments, including golf courses, athletic fields, ploughed farms, gravel lots, and mudflats. The dense vegetation actually works against them. They hunt by sight and require a clear view of their prey.

This is where diet and nesting habits play together more than people think. Killdeer nest on bare ground – gravel roofs, driveways, medians in parking lots, and ploughed fields – since those are precisely the terrains they are already foraging in. No extra trips to feed themselves or their chicks later are needed.

Ground-nesting also fits with the rest of their survival strategy. Killdeer eggs are mottled and speckled, providing nearly perfect camouflage against gravel and dirt. And if a predator approaches close, the adult does its familiar "broken wing" act, dragging one wing as if injured to lure the threat away from the nest before flying off unscathed once the danger has moved far enough away. None of that applies to a tree. As a family, plovers never evolved the nest-building instinct of songbirds; their entire strategy is open ground with excellent sightlines and natural camouflage, and it's worked for millions of years.

Killdeer chicks are precocial, hatching covered in down, with their eyes open and able to walk within hours. Unlike songbird chicks, Killdeer chicks never receive beak-to-beak feeding from their parents. Instead, the adults lead them to suitable foraging grounds, and the chicks soon begin feeding themselves — tiny insects, small worms and soft-bodied invertebrates that they can handle with their still-small bills. At this point, the parents' major function is protection and guidance to food-rich spots, not the delivery of meals.

Killdeer don't come to feeders, so attracting them is really about habitat and not about food you put out. They really want open ground they can see and quick access to insects, so a small area of short or mown grass, a gravel path or an open area near a pond edge gives them what they want. Avoid using heavy pesticides on your lawn—it kills off the beetles and grubs that deer eat. If a killdeer nests in your yard or driveway, the best thing to do is leave the area alone. Both eggs and adults are protected under the Migratory Bird Treaty Act, and the nesting period is only about 24-28 days before the chicks are up and walking.

Killdeers are made for one thing: hunting insects and small invertebrates on open ground, day after day. If you want to attract them, don't bother with birdseed. A mowed lawn, a patch of gravel, or an untreated garden bed will do a lot more to bring them in than any feeder ever could.