The main threat for the survival of the great green macaw was habitat loss. It is estimated that between 1900 and 2000 some 90% of the original habitat has been lost in Costa Rica. Private land not owned by the government is or has been developed into agricultural fields for the production of crops such as oil palm, pineapples and bananas. Especially in the 1980s and 1990s the unsustainable harvest of "Dipteryx oleifera" and other trees that produce high quality wood is thought to have further compromised macaw habitat, as only 30% of the remaining rainforest in the northeast is thought to be primary. As of 2015 Indio-Maíz Biological Reserve in Nicaragua is threatened by settlers moving into the reserve to found farms, especially of subsidence agriculture, oil palm and cattle. Costa Rican loggers continued to cross the border to illegally harvest timber in the reserve as of 2007.