Arty, from what little reading I've done regarding the Vasa's I think they still are rare. But that may be changing given the success of the breeding program that was set up. I don't know what their actual numbers are today.
Vasas are relatively rare in U.S. aviculture. However, they are being bred successfully.
They remain on the CITES II - Endangered Species
This is from an article written in 2000:
One of the least known but most interesting of the parrots is the Greater vasa parrot (Coracopsis vasa) which originates from Madagascar. The vasa parrot is considered to be one of the most ancient and primitive of parrots.
The number of vasa parrots in the U.S. is not known, but the numbers are suspected to be low. Most of the wild caught vasas were imported in the eighties. In the wild these birds are under severe threat of habitat loss as the only remaining forest is a tiny sliver of green extending from the top to the bottom of Madagascar, along a hilly rocky ridge. The Greater vasa parrots forage in the forest, but mostly along the forest perimeter and into the surrounding crop lands, where they are sometimes considered a pest. The smaller version, the Lesser vasa (Coracopsis nigra) appears to prefer the deeper forest areas for feeding and breeding.
In 1995, the nonprofit organization, Advocates for Bird Conservation (ABC) whose mission is education about avian species and conservation of threatened avian species, chose to work with the vasa parrots. Since the vasas are a dark feathered bird, largely unknown in the pet market, the likelihood of their disappearance in captivity was considered to be particularly great.
ABC obtained a flock of 16 Greater vasa parrots and continues to add to this flock when vasa parrots appear in the marketplace. The purpose of this project is to set up a permanent long term breeding collection in order to maintain the genetic viability of the species in captivity. The breeding pairs in the collection are provided the opportunity to completely rear and fledge their young, which they do quite enthusiastically.
Presently, ABC is working in collaboration with two zoos, the Sacramento Zoo and the National Aviaries. These two institutions are managing the Lesser vasas and ABC is working with the Greater vasas. For further information regarding vasa parrots or the Vasa Project, contact Laurella Desborough by email:
EclectusCI@aol.com.
http://www.birdmag.com/vasa.htm
They are considered part of the AFRICAN PARROTS: Congo African Grey, Timneh African Grey, Jardine Parrot, Brown Head Parrot, Meyer's Parrot, Red Bellied Parrot, Senegal Parrot, Cape Parrot, Vasa Parrot.