There are definitely avocado trees (a couple varieties) in my area, although I don't have one on my property. Have never researched the histtory of them in Mexico.
There is an avocado tree on a property across the river from me, I don't know exactly where it's located, but my dog does! In avocado season, I'll find them laying in my yard- she trots back with them. Because she has what they call a "soft mouth", she carries them really gently, there is often not even a tooth mark. If it's a good looking one, I tell her thanks, and eat it. But she actually brings them because dogs generally love avocadoes. Full of oil and high in protein. It's so funny- she'll put an unripe one on her mat, wait a few days for it to ripen, then eat it.
Super easy and delicious avocado recipe, great on a hot summer day- Cold Avocado Soup.
Throw a couple cut-up avos, some plain, unsweetened yogurt, some chopped garlic, lemon juice, a dash of salt and cilantro (you can leave out the cilantro, some people hate it, use fresh basil or any other herb) a handful of ice, and whizz in the blender or food processor.