That's a whole lot of flicker you've stirred up there.
I haven't seen that much intense flicker activity since I watched my old vacuum-tube TV
with a set of rabbit-ear antennae.
If there are truly that many of them out there then there is a flicker of hope I'll get
a closer shot of one too ... someday.
I guess they will be heading farther north soon so you might as well capture them
as much as you can.