The average age varies greatly by species. 46 was the longest age  of a snake in captivity at the Philadelphia Zoo. The average age of  North American Snakes will live aboutâ¦ 18-20 years in captivity.
4) Pregnancy. Pregnancy is another of the common causes of swollen feet and ankles. There are three reasons for this: a) the excess weight gained puts more pressure on the legs and feet. b) the expanding uterus can place pressure on the blood vessels for the legs and. c) pregnancy hormones cause the body to retain fluids.
Swelling in the ankles can be a general medical systemic cause. Heart failure, diabetes, kidney problems (nephritis), drugs like gabapentin etc...will usually cause equal swelling in both feet. One foot implies something is going on there. 1) swelling can reflect something in the abdomen...swelling. Lymph nodes, ovary etc.