Hyacinthine Macaws in the wild
Report on the Hyacinth Macaw in the Audubon Wildlife Report (1989/90, pages 405-19) by Charles A. MUNN, Jorgen B. THOMSEN and Carlos YAMASHITA
Entry on the Hyacinth Macaw in Threatened Birds of the Americas by N.J.COLLAR, L.P GONZAGA, N.KRABBE, A.MADROŃO NIETO, L.G. NARANJO, T.A.PARKER III and D.C.WEGE. Published at the end of 1992 by the Smithsonian Institution Press of Washington and London in cooperation with the International Council for Bird Preservation, Cambridge, U.K.
The Great Blue Macaws by Tony PITTMAN. Published in Just Parrots, 1995/6, Issue 7
Man-made hatchery in Brazil by Tony PITTMAN. Published in Just Parrots, 1996, Issue 9
The Pantanal A travel report by Thomas ARNDT published in WP Magazine (January/February 1998 issue, P. 16-21)
Conservation puzzle: Endangered
hyacinth macaw depends on its nest predator for reproduction
by Marco Aurélio Pizo, Camila I. Donatti, Neiva Maria R. Guedes,
Mauro Galetti. Published in Biological Conservation 141 (2008) Pages 792-6
