Luxembourg's Grand Duke Henri was a twitcher for a day...

His Royal Highness the Grand Duke took a trip to the migratory bird banding centre located in the Schlammwiss nature reserve of the "natur-mwelt Foundation of Natur" on Friday 22 May,

Hugely passionate about nature and ecology, the Grand Duke has been a patron of the foundation since 2008.

The centre's aim is to protect biodiversity in the Grand Duchy of Luxembourg.