Quarrelsome neighbour

The Eurasian Oystercatcher (black tail on the edge of the roof) has lived on that roof every summer for few years now, but this year they seem to have some nasty neighbours...  :/  

Hopefully they'll manage to defend their nest and babies and stand for those roudy bullies.

Yo you arrogant common gulls, go away! You have plenty of room everywhere else in this town, so leave the poor oystercatchers alone.