The legal challenge was launched against the 784MW Inch Cape, the 450MW Neart na Gaoithe, and the Seagreen Alpha and Bravo projects, with a combined capacity of over 1GW – all four of which received consent last October.
RSPB Scotland objects to the plans due to the proximity of seabird colonies.
A spokesman for the charity said: "We have not taken this decision lightly, but having given serious consideration to these decisions to grant consent, we have decided to take legal action.
"RSPB
