On the 10 April 2016, one of our ringers was in the reserve when he made a very interesting observation of a putative Crag Martin (Ptyonoprogne rupestris).
The bird was seen flying from SW to NE over the reserve. The identification was based on several criteria and past experiences of the ringer observing the bird. The criteria were flying jizz of the bird, squarish tail, white spots on tail, dark under wing coverts, dark undertail coverts amongst others.
If accepted by the rarities committee of luxembourg this would be the first ever sighting of this species in the country. Well done to our team for the sharp eyes!