DBK
LIFE MEMBER
Thanks to @Hilltopper the mystery beetle has been identified.
It is Calosoma sycophanta and is a serious caterpillar eater. It is native to Europe but has been deliberately spread to areas which suffer from plagues of caterpillars such as the processionary moths and here on Corsica to protect Cork oaks from the Gypsy moth.
And my estimate of its size was wrong, they are 25mm long and fast movers.
https://en.m.wikipedia.org/wiki/Calosoma_sycophanta
It is Calosoma sycophanta and is a serious caterpillar eater. It is native to Europe but has been deliberately spread to areas which suffer from plagues of caterpillars such as the processionary moths and here on Corsica to protect Cork oaks from the Gypsy moth.
And my estimate of its size was wrong, they are 25mm long and fast movers.
https://en.m.wikipedia.org/wiki/Calosoma_sycophanta