A new habitat for sand martins
A gravel pit owner in canton Aargau has created a nesting place for sand martins, to try to boost the number of these endangered birds, and he's urging fellow pit owners to follow suite. (SRF/swissinfo.ch)
A gravel pit owner in canton Aargau has created a nesting place for sand martins, to try to boost the number of these endangered birds, and he's urging fellow pit owners to follow suite. (SRF/swissinfo.ch)
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