Some time after the Hazel, the Willow is usually the second deciduous tree to wake up with catkins.
The picture shows the beautiful and velvety male catkins of a Goat Willow.
Dutch name : Boswilg
German name : Sal-Weide
Latin name : Salix caprea
A big thanks to [fc-user:1179145] for the kindly nomination of this picture.