A caterpillar that is pink and as a blue horn and found in France is called a hawk moth. These moths can grow very large.
The blue horned sperm worm
tomato horn worms.
American Dagger Moth Caterpillar.... I found one in my drive way
Lime Hawk-moth Mimas tiliae
Depending on where you live it might be some sort of Hawk Moth or a Fawn Sphinx. If you want to search for the Sphinx better enter "Sphinx kalmiae" otherwise most hits will be for the cat Sphinx. .
The answer to this question can be found at www.vegedge.umn.edu/vegpest/hornworm.htn
Not a Hawkmoth, this is a swallowtail butterfly caterpillar.
it is a Lime Hawk Moth originating from England
The horn of plenty started in France. The whole website started in France.
I Found My Horn was created in 2008.
France
France