The first sand martins of the season have arrived back at a North East wetland centre  - and have already shown early interest in a new nesting bank.

The artificial bank, which has space for 100 nesting pairs, was built in October last year in anticipation of the migratory birds’ return to WWT Washington Wetland Centre this spring.

Visitors have already started seeing sand martin flying around the east end of the reserve’s Wader Lake, with some spotted perched around several of the openings.

Some birds have even been photographed inside the chambers, with fantastic views being had from the newly opened Vic Robins hide at the east of the reserve.

The Northern Echo: A flyby sand martin checking out the new artificial bank at WWT Washington Wetland Centre

Sand martins (Riparia riparia) – the smallest of the European hirundine family, which includes swallows and house martins – typically hunt and feed over the site’s Wader Lake in spring.

They’ve previously been noted attempting to dig natural nesting chambers nearby in the sandy banks of the River Wear, but with no success.

It’s hoped that the newly introduced artificial bank - made from cavity blocks fitted with nesting tubes - will provide the perfect conditions for the species to finally settle and breed on the site for the first time in the site’s 49-year history.

The Northern Echo: A sand martin checks out a hole at the new artifical bankA sand martin checks out a hole at the new artifical bank (Image: CHRISTOPHER BILL)

Reserve manager John Gowland said: “Sand martins are one of the first spring migrants to arrive on our reserve each breeding season and are a favourite with our visitors and members.

“We’ve tried several things to encourage sand martin to nest around Wader Lake in the past, including reshaping a section of the bank to create a naturally vertical wall. However, we now know the soil type wasn’t quite right for them.

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“We’re hopeful the introduction of the new artificial bank will see some success for the species, and these early sightings are very encouraging. We’re keeping our fingers crossed that some choose to settle and breed here.”

The Northern Echo: Managers hope sand martins will settle into the new custom-made banks in WashingtonManagers hope sand martins will settle into the new custom-made banks in Washington (Image: IAN HAMILTON)

The sand martin bank is part of ongoing habitat management around Wader Lake, which over the last three years has already benefitted from desilting work, deepened water channels and more effective vegetation management.

This work is to improve the area for a variety of wildlife, whilst creating a more enhanced wildlife viewing experience for visitors to enjoy while at Washington Wetland Centre.