I know I am late but this may help. I have cherry picked some info for you.
''Unlike other parrot species, eclectus parrots are polygynandrous—females may mate with multiple male suitors and males may travel from nesting site to nesting site to mate with multiple females. Suitable hollows are at a premium and the hen vigorously defends her chosen nesting site from other females (perhaps even fighting to the death), remaining resident at 'her tree' for up to 11 months of the year, rarely straying from the entrance to her hollow and relying on multiple males to feed her via regurgitation. Males may travel up to 20 km to forage and up to five males will regularly provide food for each female, each competing with the others for her affections and the right to father her young''. -
Eclectus parrot - Wikipedia
'' Several species of cockatoos, the eclectus and a few other species have a reputation for aggression toward their mates - but this behavior has also been seen in cockatiels and lovebirds. In most species, the male is the aggressor -- with the exception of the eclectus parrots, where the dominant sex is the female.
It should be noted that this problem is specific to aviculture -- as it has not been observed in the wild. One explanation may be that wild parrots have the advantage of being able to choose their own mate; they also have "time away" from each other when foraging for food. In the wild, they have the ability to separate once incompatibility has been established.''
'' In natural situations, the hormone levels of mature males and females are in sync, so that both will be ready to mate at the same time. Pets are not often exposed to normal day/night cycles, weather patterns, air pressure changes and other conditions that affect breeding readiness (remember, these factors have molded parrot evolution for millions of years). While captives will survive unnatural conditions, their hormone production can be affected. Therefore, one parrot’s hormones may be stimulating it to reproduce, while its mate is being signaled to avoid reproductive behavior.''
Mate Aggression in Parrots - Why Parrots Fight with their Partners
