The birds have previously been reintroduced to parts of south east England.
Adult Eurasian crane, also known as the common crane, stand more than a metre (3ft) tall and have a wingspan of more than 2m (6ft).
The birds have a loud “trumpeting” call and feed on berries, insects and small birds and mammals.
The Cairngorms National Park is already home to captive Eurasian cranes with the birds kept in an enclosure at the Highland Wildlife Park at Kincraig.
In the wild, the species is found across continental Europe and Asia.
Cairngorms Cranes involves several organisations including Scotland: The Big Picture, Cairngorms National Park Authority and Findhorn-based Trees for Life.
Public body NatureScot and the Wildfowl and Wetlands Trust have advisory roles.