UK migrants (mainly moths).

[Chris Raper]

On 29 Jul 1998 01:30:59 -0700, kendrick at hkusua.hku.hk (Roger C.
KENDRICK) wrote:

> Mythimna separata (Noctuidae: Hadeninae) is a well studied species that
>winters in southern China and then migrates to north-east China over several
>generations, arriving around May or June. 

That story is much more like the Monarch migration in the US. I
suppose if all boils down to dispersal vs. migration. Do you happen to
know if Painted Lady / Rush Veneer etc disperse south,east or west as
well as north? If the dispersal was directional then I would tend to
call it migration even if there was no return journey.

Chris R.