I personally know of at least 3 "eagles in cockpit" incidents, shattered canpies and.

and this tragic event in Spain, 2 finnish pilots deceased due to collision with a 9.5 kg bird:
https://www.fomento.gob.es/recursos_...2011_a_eng.pdf

I guess this proves that bird strike may cause serious damage to a glider.

Aldo Cernezzi