A retractable deflector to deflect birds and debris from an air intake duct of an aircraft jet engine. The duct has a central longitudinal axis and a forward opening for air receipt. The deflector includes a plurality of elongate first support members disposed on the duct having leading ends which extend from a perimeter of the opening, mounted for movement to extend and retract the leading ends. A second support member is coupled to these leading ends to retain them in spaced relation. The second support member is extendible in length and configured to hold the leading ends of the first support members sufficiently close together to cause the first support members to deflect at least one of a bird and debris when deployed, and to allow the leading ends to maintain a spaced-apart relation along a line which approximately corresponds to the perimeter of the duct when retracted.
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