We all know that saying, “he’s as cold blooded as a damn reptile!” (or snake or croc), but what does it actually mean?
Does the blood that flows through a reptilian system actually have a lower temperature than a mammalian system? If so, why??? Is this why reptiles generally live in warmer/hot climates?
Also, what significance does this have for a reptile in general? Does it really indicate that they are far “cooler” or less prone to nervous outbursts as humans are? Do they get nervous in the same way that mammals do? Like when I approach a cat, it appears to be really nervous, as well as on it’s guard for me (as a potential predator). However, a lizard appears (or at least gives me the impression that it is) far more sedate than the cat is, even though it is still on it’s guard. Is this because of a natural difference in reptilian and mammalian nervous systems, or is it just a false generalisation?
Also, why are reptiles such efficient predators? Are they truly more mechanical and machine-like than us mammals? Whenever I read about snakes and lizards, they’re target-to-kill ratio appears far better than in the average mammal. Why is this, or how wrong am I?