There is stick insects with a total length of more than 60cm living in China in our time (and that's way bigger than a few chihuahuas in a trenchcoat), no need to go back 40 or 50 millions years back in time.
Meh, once again the monsters don't look that threatening...
I understand that the mangaka want to protect the MC misunderstanding but it feel quite ridiculous to hear all the time those supposed elite monster killers ranting about how an insect around the size of a small dog or cat is an end of...
It was easy to guess that the writer of silver would be a vampire...
But the exhibitionist part was unexpected.
Let's hope it was just to show the silver bearing back and not shoehorned fan service...