Rose-coloured Starlings etc

After sampling the boreal bird delights of Estonia for a week, it was back to birding in Hungary yesterday. A day trip around the northern part of the Kiskunsag produced about 20 Collared Pratincoles, 3 Great Bustards, 2 Saker Falcons and 2 small flocks of Rose-coloured Starlings hurtling by. I later found out that flocks of the latter had been seen elsewhere in Hungary, so the question is... is a major invasion underway ?