Last modified: April 23, 2019, 12:44 p.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.