I have lost a pair of parakeets and a turtle many years ago.
The pair of parakeets figured out how to lift the cage door with their mouths. One morning they were just gone with the cage door wide open. They were never found.
We had to reinforce the cage door with steel wires for the next pair of birds to make sure the same wouldn't happen again. Then the next pair somehow figured out how to "thin out" the cage bars by grind their mouths against it. The cage bars were made of wood, so eventually a few of the wooden cage bars became thinner and thinner before finally broke. We got a new cage for them with steel bars.
The turtle I had also escaped without a trace. I had it for years. It was never found.
