Yes Trish, kakas are flock birds.....
To expand on the lowly kakapo, Trish is correct about their congregating at mating time.....when a male gets in the mood, he will establish a 'lek' or mating area, usually in a sort of hollow, then he will start 'boomin' or calling all area females to the party.....as Trish mentioned, they are solitary birds.....until sailors brought rats & feral cats to New Zealand, the kakapo had no natural predators, so they didn't need the communal protection of flocks.....
Anyway, this 'booming' can be heard for miles, so a few females, no females or twenty females may show up.....since the females responding to the male's 'booming' are coming for the purpose of mating, it is incumbent on the host to service all of the females in attendance.....this is because the kakapo do not mate/breed every year.....then the male goes off do what ever male kakapo do when their out with the 'boy.'
The hens go off & lay their one or two eggs, then feed & raise their chicks as single parents.....keep in mind this is all by choice, because the hens leave the 'lek' before the males...the males keep waiting for any 'fashionably' late arrivals...or maybe they're just procrastinators.....
