Wildlife

Sand Martin: River Bank Nesting Specialist

Sand martins excavate burrows in vertical sandy banks and face welfare threats from both habitat loss and climate change.

Key Facts

Sand martins excavate nesting burrows up to 60 centimetres deep in sandy banks
UK populations declined by 89 percent in the 1960s-70s following Sahel drought
Populations recovered but remain vulnerable to drought in African wintering grounds
They are the smallest European swallow family member
Sand martin colonies may number hundreds to thousands of pairs in suitable habitat

Welfare Considerations

Sand martins are highly dependent on naturally eroding river banks and quarry faces for nesting. River management that stabilises banks eliminates nest sites. Floods during the breeding season can collapse entire colonies. In Africa, prolonged drought on migration routes and wintering grounds causes mass mortality. Aerial insect decline reduces food for adults and chicks.

What You Can Do

Support river management that allows natural bank erosion in appropriate locations
Encourage quarry operators to maintain and create artificial nesting banks
Monitor sand martin colonies in your area and report numbers to BTO
Support drought relief and habitat protection in the Sahel region of Africa
Join local river conservation groups that advocate for natural river processes