Ile de France – Bougival –
In summer they are purplish-green iridescent with yellow beaks.
They prefer to live near human settlements.
Traveling in large group, the species is partially migrant .
They are gregarious and spend their time forming groups, which can reach more than one million of birds. they sleep in community dormitories having then a protection against predators. When they fly in group, they can have brutal change of direction and in presence of a danger they gather together making a « compact » big ball.
They have a large vocal range and can imitate many other birds, being very noisy.
If they usually nest in the holes of a tree, they also stay in a wall or in some hidden place of a roof.