Do ducks have gangs?

I stopped by a local lake today to take some pictures. These 2 ducks started chasing the little guy with the black head and puffed up feathers. Every time he slowed down they kicked up water and took out after him again.

When he finally reached the shore he started chasing 2 ducks that kinda looked like little outcast ducks.

I’m not sure…but I think there maybe a need for some duck police to patrol these waters!