A link i came across the other day: Tipsy Nipper Februry 2013 in California
https://dms.ntsb.gov/pubdms/search/h...FAD25FC8F84398
"Analysis:
The airplane was in cruise flight about 2,000 feet above the ground when several witnesses reported hearing a loud "crack," "pop," or "snap" sound and then looking up and seeing something separate from the airplane and then pieces falling to the ground. The outboard 4 feet of the right wing was found about 2,000 feet away from the main wreckage, and a turkey vulture carcass was found near the wing section. Postaccident examinations of the wing section revealed blood spots and a downy barbule, which was identified as a fragment of a turkey vulture feather."
Probable Cause and Findings
The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The airplane's impact with a turkey vulture in cruise flight, which resulted in the structural
failure of the right wing and the subsequent loss of control.