I fairly recently found out that nights in Belize, Ecuador, etc. often dip into the low 60's. Yet these are their ancestral habitats.
I wonder whether keeping them from dropping below the high 70's is not a good choice."
When is it in the low 60s at night in central America? Winter months? What are the nighttime lows the rest of the year? Guessing over 70.
Just because it may get cool at night for part of the year down where iguanas come from doesn't mean that they prefer to be cold. Is what it is.
Not like they can just pack up and move somewhere much warmer than the equatorial zone.
If we have our house open here in west central Florida, the temp this time of year is typically in the upper 70s at night. I'm supposed to turn on the A/C for the iguana at night so he can sleep in cooler temps? Heck our house is NEVER in the low 60s!
"I'm thinking about this because of the mystery of why the captive iguana life-span is 1/2 to 1/3 that of their wild relatives. Most well cared for wild animals live longer than the wild ones."
If a "most well cared for" captive iguana is going to live 15 (or 20) years and that's only 1/2 to 1/3 of their normal lifespan ... a wild iguana lives for 30 to 45 years??
I sure didn't know that. I'm fond of Mr. Ted, but I sure wouldn't want him living 30 to 40 years!
Even if it were preferable for nighttime temps for an iguana to be in the low 60s, and I highly doubt that, that would probably be a very unreasonable goal for most iguana owners.