The really odd thing about termite swarms is that it is the one time when cooperation goes out the window.  Its every termite for his or her self.

A swarm is a coordinated flight of winged (alate) termites.  It happens several times a year when the local colonies try to release fully grown (fit, healthy, strong, winged and sighted) termites for reproduction.  They fly off, typically only a 100 mm (say 300 feet) or so inless there's a breeze, looking, if femal for a home site and if male, for a female with a good homesite.

They sometimes seem to fill the sky.  Almost all fail but just enough make it so that they keep on surviving.

More here.