The Loch Lomond meeting will discuss the geographical boundaries of the proposed agreement, the species to be covered and whether or not it should be legally binding. The accord is expected to be finalised in the United Arab Emirates next year,
More than 50 percent of the birds likely to be covered are threatened either at global or regional level, according to a British government study in 2005.
Among the 77 species under discussion are eagles, falcons, harriers, kites, buzzards and ospreys.
"Migratory birds of prey include some of the most threatened species worldwide and their populations are excellent indicators of the state of the wider environment," said Professor Colin Galbraith of Scottish Natural Heritage, chairman of the conference.
"This meeting provides a unique opportunity for governments and other organisations to come together to address some of the key issues affecting birds of prey, including persecution, habitat destruction and the long term effects of pollution."