Happens alot down there
I remember seeing it in 1969 while down for basic training at Lackland AFB.
I was amazed the sidewalk was black with them swarming across the cement.
I remember finding a huge mantas and letting my son keep it in a terrarium. I would flip over the garbage cans and a bunch of crickets would jump out. We’d catch them and feed the big mantas. Then things froze around late November and I actually started to buy crickets at the pet store. Around late March the mantas died from old age.