Broken Wing Display | ROLLING HARBOUR ABACO

ON THE WING: BLACK-NECKED STILTS, ABACO, BAHAMAS

Black-necked stilts Himantopus mexicanus may be the most elegant shorebirds you will ever see. They are permanent residents on Abaco and not uncommon where they are found. It could be on a beach; more likely it will be in or around brackish ponds. It won’t be in the pine forest or coppice.

The rather disorganised stilt flying in the header image rather undercuts my claim for elegance, I realise. The image above of the bird at full stretch against a background of waves gives a much better idea of the beauty of this species.

Gilpin Pond is a good place to see stilts, and in summer they nest around the perimeter. A word of warning: they may be aggressive in the breeding season. I got too near a nest once and the female shouted at me then flew straight at my head. I hadn’t even realised there was a nest there until this happened, so her actions rather give the game away.

In common with some smaller shorebird species – for example, plovers and killdeer – the stilts have another defensive method to protect their young, a so-called ‘distraction display’. When their nest is under threat, one of the adults will pretend to have a damaged or broken wing and so be unable to fly. It will flutter feebly along the ground, moving further and further away from the nest, diverting attention from it. It’s an amazing sight to watch the tactic in action. Check out this video to see examples of this behaviour.

Credits: all photos by Alex Hughes, one of the photographic contributors to The Birds of Abaco; video Nat Bel

SCRAPES, CHICKS & BROKEN WINGS: WILSON’S PLOVERS ON ABACO (3)

The male plover above is keeping watch from a rocky vantage point over an area at the north end of the beach at Delphi. And with good reason. It’s the summer breeding season, and on the sand are some nests. One of them is his.

This is a ‘scrape’ – not the carefully constructed nest that most birds make, but a shore bird’s collection of sticks and twigs – sometimes stones or shells – clumped together on the sand to provide a comfortable place for the mother to sit until the eggs have hatched.

Though tiny at first, the chicks soon become independent enough to explore their surroundings

Usually, there will be a pair of chicks, maybe more. The two in the photo below have scuttled to the back of the beach for safety because the adults thought I was getting a bit close, and sent them to hide in the pine needles

When a nest is threatened by a predator, Wilson’s plovers have a defensive technique that is remarkable to watch. Other shore birds, for example Killdeer, resort to this method as well. A parent will flutter about pathetically on the sand, apparently with one or both wings broken, attracting the predator by its faked vulnerability. The plover will gradually draw the threat away from the nest area, protecting the eggs or allowing chicks to make themselves scarce. Here are some examples of the ‘broken wing display’, all photographed on the beach at Delphi. The first 2 images show a female; the third, a male.

Athough the little chicks are vulnerable, they grow quickly

Before very long, they are able to get onto the same rocky vantage point as their parents to practise surveying the scene. Next summer, they will be keeping watch over nests and chicks of their own.

The previous posts in the series are WILSON’S PLOVERS (1) showing the adults; and WILSON’S PLOVERS (2) that shows how plovers nesting on the shore at Nettie’s Point were protected from human activity in the boat-launching area.

“I’m off now. See you next year”Credits: scrape & broken wing display, Clare Latimer; last (and best) chick image, Tom Sheley; the rest, RH