The Migrant Hawker (Aeshna mixta) occurs in North Africa, southern and central Europe to the Baltic region.
It is in the family Aeshnidae and is very similar in appearance to the Southern Migrant Hawker (Aeshna affinis) which lacks the T-shaped mark which is found on the top of the second abdomen segment in Aeshna mixta (clearly visible on the first and last photo).

First 3 photos: 's Graveland, The Netherlands, 28 August 2012
4th photo: Maarsseveense Plassen, Maarsseveen, The Netherlands, 13 September 2016
5th photo: De Natte Graslanden, Lepelaarsplassen, Almere, The Netherlands, 18 November 2021