The Aldabra kestrel is the absolutely close relative of the Malagasy (Madagascar) spotted kestrel, only slightly smaller, and it was previously considered the same species as the Seychelles kestrel, in Creole katiti. It can reach a size of 30 cm. The wings are 170 mm to 183 mm at the males, and slightly wider at the females.
The habitat of the Aldabra kestrel is the Aldabran Island of Grande Terre, and feeds mainly on insects, usually taken them during the flight. They occasionally eat small birds and mammals, taken on the ground.