Sand martins nest colonially in riverbank cliffs and sand quarries, with habitat availability and quality directly affecting breeding welfare outcomes.
Sand martin welfare during breeding depends on the stability and quality of nesting banks. Natural riverbank systems subject to flood erosion, trampling, and vegetation encroachment are increasingly unreliable nesting substrates. Artificial nesting banks created in sand quarries provide stable, long-lasting alternatives and now support important populations. Bank protection during breeding and nest record card reporting help quantify welfare outcomes.