Catching and ringing Sand Martins Riparia riparia occupying an artificial nesting site (a purposely placed concrete wall). Today @ Sekdoorn (Stichting Avifauna Zwolle).
Showing posts with label Sand Martin. Show all posts
Showing posts with label Sand Martin. Show all posts
Sunday, June 18, 2017
Holes in a wall
Catching and ringing Sand Martins Riparia riparia occupying an artificial nesting site (a purposely placed concrete wall). Today @ Sekdoorn (Stichting Avifauna Zwolle).
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