After their young have left the nest they go in small packs.

I saw ten or twelve rise from an arable field on the 18th of June last year; there do not often seem to be more than a dozen together.

I have counted ten in a pack on the 16th of September, and seven together as late as the 2nd of October.

Soon after that they appear to separate and act on their individual wishes.

Starlings in like manner pack after their young can fly, but then they do not separate in autumn.
It may be remarked that by autumn the young missel-thrushes would not only fly well, but would have been educated by the old birds, and would have come to maturity.