Willet: The Gray Shorebird With the Flashy Wing Stripe

How to Identify a Willet

Standing still on the sand, a willet is easy to write off as just another gray shorebird. It’s a big, robust bird — noticeably taller and thicker-bodied than the sanderlings and plovers scurrying around it — with a long, straight, blackish bill and bluish-gray legs. The plumage is plain: mottled grayish-brown above, pale and lightly streaked below, with none of the rusty breeding colors you’ll see on some other shorebirds passing through. Most of the year it reads as camouflage, built to disappear against wet sand.

Then it flies, and the disguise falls apart. A willet in flight flashes a bold, crisp black-and-white stripe running the full length of each wing, top and bottom — a pattern no other shorebird on this stretch of Gulf coast shares. Once you’ve seen it, you’ll never mistake a willet again, even in silhouette. If you want to sharpen the comparison, our shorebirds guide lines up the willet against smaller look-alikes like the wave-chasing sanderling, which shares the same tide lines but never shows that wing flash.

That Loud "Pill-Will-Willet" Call

The willet is one of the few shorebirds named for its own voice. Flush one, or catch it in a territorial mood, and it announces itself with a loud, ringing, three-note call that sounds almost exactly like its name: pill-will-willet, pill-will-willet, repeated insistently until whatever bothered it moves on. It’s a far cry from the quiet peeps and chips most sandpipers make, and it carries — you’ll often hear a willet before you spot it, over the wind and the hull slap of a boat idling past.

Willets call most readily when defending a feeding spot or reacting to something moving too close, which on a boat-only island usually means another bird, not you. In the quieter nonbreeding months the call turns into a shorter, sharper "kip" note passed between birds loosely spaced along the swash zone, but the classic pill-will-willet is still the giveaway even when you can’t get a clean look at the bird itself.

Where to Find Willets on Marco Island

Willets want exactly what the tide gives them: a strip of wet, exposed sand where worms, small crabs and mollusks are pushed up or flushed out as the water recedes. That makes the swash zone — the few feet of beach where waves are actively washing in and out — the willet’s preferred office, and it works that strip methodically, probing with its bill a step or two ahead of the next wave. It’s one of the most reliable birds in our Wildlife Guide for exactly that reason: consistent, easy to find, and rarely picky about where it feeds.

On our stretch of coast, that means the boat-only sand flats: Sand Dollar Island and Tigertail Beach and the barrier beaches of Keewaydin both hold willets working the tide line most days, often just yards from where shellers are bent over looking for a whelk or an olive shell. The Big Marco Pass Critical Wildlife Area, the protected sand spit and pass just off Marco Island, is designated specifically to give shorebirds and seabirds room to feed and rest undisturbed, and willets are regulars there along with terns, skimmers and plovers. Because these islands are only reachable by boat, the birds see a lot less foot traffic than a public beach would get, and they tend to let you get closer before flushing.

Willet vs. Other Look-Alike Shorebirds

At a glance, a willet can blur together with a handful of other mid-sized wading birds working the same flats, especially before it takes flight and gives away its wing stripe. Size and leg color are the fastest way to sort them out from a distance, before you ever get close enough to study the bill.

A greater yellowlegs is slimmer and noticeably longer-legged, with bright yellow legs instead of the willet’s bluish-gray, and it wades in shallow water rather than working dry sand. A short-billed dowitcher is smaller, more compact, and feeds with a distinctive up-and-down "sewing machine" bill motion that a willet never does. A sanderling, by contrast, is tiny next to a willet — pale, fast, and always chasing the wave edge in a tight little sprint. None of the three shows anything close to the willet’s black-and-white flight stripe, which is why that single field mark settles most identification arguments on the spot.

When to See Willets on Marco Island

Willets are a year-round bird here, which sets them apart from a lot of the shorebirds that only pass through on migration. What changes through the year is which willets you’re looking at. The Eastern willet nests in Gulf Coast salt marsh and dune grass in spring and summer, so a few pairs stick around through the warmer months defending territory with that loud call. The Western willet, a paler, slightly larger subspecies that breeds far inland on prairie wetlands, arrives on our beaches each fall to spend the winter, and it’s common to see more willets working the flats from around October through April as those wintering birds settle in.

Tide matters more than season for actually spotting one. Willets feed where the sand is wet and freshly uncovered, so a low tide — morning or evening, whichever the calendar gives you — puts more exposed flat in front of more birds. A shelling drop-off on one of the boat-only islands times itself to that same low tide for the same reason shellers want it: more beach, more finds, and willets working the same wet sand a few yards from where you’re bent over looking for a junonia or a lightning whelk. Book a shelling tour or a dolphin & wildlife tour and you’ll likely get both the birds and the shells in the same morning.