I've seen many frogs and newts at the bottom of Shale Shaft on Old Millclose Mine.
Frogs and toads - mostly toads - are common in Cornish shafts, and quite often we will gather them up and take them up to the surface where they can pig out on slugs and snails.
We have one location where there is a healthy population of pigeons and when navigating through the mine, you have to be carefull not to step on them or crush their nests.
The worst place was a shaft on Wheal Gorland that regularly had
Kennel Waste dumped down it. The walls of the shaft were plastered in live maggots; I've never seen so many.
On the last visit about 6 years ago there was no sign of them at all. We still refer to it as Maggot Shaft though.
"You Chinese think of everything!"
"But I''m not Chinese!"
"Then you must have forgotten something!"