When I was working on my Commercial pilots license in north Louisiana my flight instructor told me to always look under the plane before starting to inspect it to make sure that there are no snakes coiled up under it. If you don't you may get bit in the leg while performing your walk around inspection of the aircraft. Only once did I see that and it was a small rattler between the two main gear. I made a bunch of noise and it went away.
HE also warned me to check the pitot tube (which is part of the airspeed system)
to make sure any "Dirt Daubers" didn't make a nest inside of it, which could render it useless. Being the fresh yankee from the north I asked him a "what?" could crawl up in there? I had never heard of dirt daubers before. He almost laughed his ass off at me. He didn't think that there was anyone alive that didn't know what a dirt dauber was. In my entire flying career of 37 years, I have yet to see a dirt dauber in a pitot tube. But if you don't check it out, that'll probably be the time you'll have one in there.