Great white pelican (Pelecanus onocrotalus) and European herring gull (Larus argentatus) in flight, 2022-09-15

I believe this is one of the pelicans housed on the big lake with the Russian restaurant next to it, or perhaps one of the stilt village pelicans. In any case it is a Pairi Daiza animal that apparently is fully flighted and will fly around above the park. Belgium doesn't have wild pelicans.