Flying ant day. 'a summer myth' BBC say

[shane]

seems there reports of flying ants are a summer myth now.

www.bbc.co.uk/nature/19963128

But at least there tracking days there mating flights are about to start.

At least we know about this factor ;D they say as well as others.

One "very consistent" factor was found to be the time of day at which they emerged:
normally between 4pm and 6pm.

[IceWhyte]

I saw a Lasius niger flight in the morning.

[shane]

I always see them in noon after a long sunny hot day but mosty alittle windy.

[TenebrousNova]

One of the earlier L.niger flights I noticed this Summer took place at about 11am, the others were around 4-5pm (Including a Lasius flavus flight, I think they have theirs a bit later in the day).