Among Spix most renown discoveries is the species Spix's Macaw, named after the explorer.
Al Thani founded the Al Wabra Wildlife Preservation (AWWP), a private conservation and endangered species breeding center in Qatar, which focuses on breeding and preservation of rare bird species, particularly the Spix's Macaw.
This species presence in riparian areas of the Caatinga of northeastern Brazil is a crucial resource for Spix's Macaw (Cyanopsitta spixii), which is presently extinct in the wild with fewer than 100 birds remaining in captivity.
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The Superior and Vice-Provincial of the monastery, Pater Alfons Spix, died in 1942 in the Dachau concentration camp, because he let the Polish forced laborers participate in worship and gave them breakfast.
All present Lear's Macaw conservation projects are managed under the authority of IBAMA.
Its bones are distinct from Amazon parrots as well as from the other medium-sized but geographically distant Lear's Macaw (Anodorhynchus leari) and Blue-throated Macaw (Ara glaucogularis).
These bats cling head—up to the smooth inner, ventral surfaces of the rolled up leaves with openings at the top, of Heliconia, sometimes Calathea, as well as other similar plants, using their adhesive disks.
coronata nuts are the favored food of Lear's Macaw, whose bill size and shape are particularly adapted to crack them.
In his book Macaw: The Race to Save the World's Rarest Bird he criticized the private holders of birds such as Antonio de Dios's Birds International, arguing that the Spix's Macaws should be returned to their native country, Brazil, for captive breeding and reintroduction to their natural habitat, which is still in decline.