Above all, beware the Camino Sheep, as they can flock across your intended path. Should you stare at the fleeting flock, you may suddenly find yourself being shaken awake, hours later, by passing pilgrims,
In truth, AncientMariner, human-animal interactions of the dangerous sort are exceedingly rare and I have not heard of any related to wildlife, though others may have.
Gnats and flies can be a brief annoyance that is easily dealt with by covering nose and mouth loosely with a shemagh or bandanna. I suppose mosquitoes could be encountered depending on location and season, although I haven't encountered any during my preferred season to walk Camino in the Fall.
I have seen 1 live snake, which didn't appear of the viper variety, and 2 dead viperish types. Salamanders and snails aplenty depending on region. But I have never seen any bears, dangerous wild pigs, or other feral, toothy types during 3 Caminos, either while walking in very early morning when dark or while walking during daylight hours.
I have enjoyed seeing the periodic deer, predator birds (falcon and hawks, or what looked similar). The more into the 'wild' a Camino route goes, like those crossing into the Picos de Europa, the more likely such wildlife viewings.
Farm dogs are a different thing from the 'pet' dog variety. There are adorable dogs that seem to make it their mission to appear cute, cuddly, and irresistible to passing pilgrims. I swear, the Spanish must have a developed a genetic cross-mutation of dog species which force pilgrims to stop and mutter silly sayings of endearment while giving scratches and scritches galore. Some even have a velcro gene, whereby they will follow you around for a while until their quota of pets and scratches have been met.
Cats? Well, I am not a cat person, but I have seen cute cats, lots of kittens, and I prefer not to touch them out of concern over potential fleas and parasites and such. Unlike dogs, who usually have owners, and barring what I know are barnyard cats, it seems that many cats are unattached street cats. If you are into cats, and even if not, it can be a bit heartbreaking.
"You are powerless. Scratch me"
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