Last modified: Jan. 5, 2022, 11:59 a.m.
First specimen was seen in the harbour of Zeebrugge (WV) in 2015. Whether it is ship-assisted or a very rare vagrant is unknown.
A very rare migrant. The status of this species is unclear.
The Belgian specimen was seen during September. Where it appears there are multiple generations a year, it's flying from February till October.