Woodpeckers usually excavate a fresh hole each and every year, leaving the old hole for other cavity-nesting birds. Cactus spines discourage animals from climbing the cactus. Evidently, nonetheless, they don’t deter snakes. I’ve viewed images of a gopher snake climbing a saguaro to prey within the dwellers in a gap. https://charlese825vem1.salesmanwiki.com/user