Ruddy Turnstone digging beach | ROLLING HARBOUR ABACO

RUDDY TURNSTONES ON ABACO: BEACH NOSHING

Some birds are named for the sounds they make (bobwhite, chuck-will’s-widow, pewee, killdeer). Some are named for their appearance (yellow-rumped warbler, painted bunting). And some are named for what they do (shearwater, sapsucker – but definitely NOT killdeer). The ruddy turnstone Arenaria interpres is in the last two of these categories: it looks ruddy and it literally turns stones to get at the goodies underneath.

And they don’t just turn stones to look for food. Someone with a lot of patience has defined 6 specific methods by which a turnstone forages for food:

Turning stones by flicking them with its beak
Digging using its beak to flick away sand or earth (see video below)
Routing around in piles of seaweed to expose food under it
Surface pecking with short, shallow pecks for food just below the surface
Probing by simply sticking its beak deep into soft sand or ground
Hammer-probing to crack open a shell and get at the occupant

In these photos taken on a rather gloomy day on the Delphi beach, a combination of mainly digging and routing is going on. Note the sandy beak of the RUTU below, right up to the hilt.

This short video shows how effective the RUTU method is. It was fascinating to watch the team work their way through and around the piles of weed on the beach, flicking sand vigorously in their quest for sandflies or whatever. Watch the sand fly! Pity it wasn’t a sunny day – the photos might have looked a bit more cheerful…

All photos Keith Salvesen

RUDDY TURNSTONES ON THE BEACH IN ABACO

Ruddy Turnstones Arenaria interpres are well-known shore birds around the world. They used to be classified as plovers, but are now counted with sanderling. Fortunately they are distinctive enough not to be confusable with the many other species of shore bird with which they mix.

Their foraging methods are classified into 6 broad categories, though I imagine that if peckish, they may opt for all of these in the one feeding session.

Routing — rootling through piles of seaweed by flicking, ‘bulldozing’, and pecking it to expose small crustaceans or gastropod molluscs hidden underneath.
Turning stones — living up to its name name, flicking stones with its bill to uncover hidden snaily and shrimpy creatures.
Digging — using small flicks of the bill to make holes in sand or mud and then gobbling up the prey revealed.
Probing — inserting the bill right into the ground to get at concealed gastropods.
Hammering — cracking open shells using the bill as a hammer, then winkling out the occupant.
Surface pecking — short, shallow pecks to get at prey just below the surface of the sand.

Between them, these turnstones seem to be using methods 1, 3, 4 and 6