If you’ve ever owned a turtle or tortoise you know the idea that they move very slow is not really true at all. Turtles and tortoises can really cover ground when they want to, getting them into a lot of trouble.
Remember the 70 pound tortoise “Spirit” that had escaped and fell from a 10 ft wall breaking its shell in three places.

And even another tortoise being picked up by the fire department as he walked down a road in El Cajon.

Other reptiles such as iguanas and monitors have escaped too, with family members hoping for their return.

And its not only reptiles, birds and rabbits make great family pets too.  And when they escape it can be devastating.
A rabbit for example cant wear a collar so microchipping is really your only chance of reuniting with them aside from posting flyers.  A microchip is a small device the size of a grain of rice injected like a vaccine. When microchipping rabbits, some prefer doing it at the time of spay or neuter, like cats and dogs.
But you can’t just microchip all exotics. Birds for instance are very fragile and need to meet a certain weight and size requirement.  As with all treatment pertaining to birds microchipping would be done a little differently and should be done with a veterinarian that specializes in avian medicine.
Although not as fragile as birds… Reptiles  need to also meet a certain weight and size requirement.
As with any injections the area must be kept clean to avoid infection, which means a clean environment. With aquatic turtles needing to stay dry at least 24 hrs after being injected.
Always seek the advice of a veterinarian specializing in avian/exotic medicine when it comes to microchipping any exotic.  Know how to prepare before and after a microchip implantation.  Microchipping like with any injection could cause reactions or infection.