This is all about an Exhibition that I was asked to supply the image below too...
After the Museum of Bagnères de Bigorre and the House of the valley in Eyne,
the exhibition Becs et Ongles will be reconfigured and will be presented from October 2017 in the Museum of Toulouse.
A link to the Exhibition 'Becs & Ongles' meaning beaks & nails.
The origin and comprehension of this expression is quite simple: when a bird has to defend itself, it does so with the means at its disposal, its beak and its claws (or nails)...
Unfortunately its all in French so you will need Google to translate...