Psephotellus, Bourkes, grass parrots:
In general these parakeets are calm. Some species are so quiet and their voice is friendly. Some people say that red rumped parrots are the best parrot singers.
They are hard to tame.
"Other parrots" category:
no description (at this moment only eclectus is there, in Polish version also budgie and monk parakeet)
Macaws:
They are the biggest parrots (the biggest three species: hyacinth, green-winged and Buffon's macaws).
Except taxonomic classification, there also is a division by their size. Mini-macaws are much smaller and are easier
to care for (but they still aren't easy).
The voice is loud.
subfamily Psittacinae (African parrots):
Two genera belong to Psittacinae: Psittacus and Poicephalus.
Timneh & Congo grey parrots (Psittacus) are one of the most
intelligent parrots (however they aren't "number 1") and one of the species with
the best
mimicry skills (next to Amazons). If you decide to
keep them you have to remember their negative features and they won't always learn
to talk. They often are attached to just one owner.
Poicephalus parrots are quite quiet (remember, it is a relative concept - they also scream). The most common species of this genus is the Senegal parrot.
Cockatoos:
Characteristic features of cockatoos:
- a crest on the head, which they may fold
or unfold, depending on their mood
- they
produce powder
down
- eggs are incubated by both parents
- they are social
and intelligent
- they aren't quiet (the loudest one is Moluccan cockatoo)
Cockatiels are a different species. They are quieter and smaller than other cockatoos
Lovebirds:
They sometimes are colloquially
known as "lovies" or "LB's".
They are small parrots but really aggressive.
Conures:
Conures are very social. They often love biting fingers, ears etc. In the wild they sleep in tree hollows, unlike most other parrots.
Bigger conures (like Aratinga genus) are louder than smaller ones (like Pyrrhura).
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Just a few very minor tweaks and spelling corrections Roz, I've put them in bold italics for you