The Department of Environment, Food and Agriculture says bats are automatically protected without the need to register their roosts.
A Freedom of information request to the department asked how locations can be registered as protected bat roosts.
But in its response, DEFA says the Wildlife Act - which makes it illegal to damage, destroy, or obstruct roosts - doesn't have a register.
Instead, any bat roost is protected, registered or not.
Repairs on Peel Power Station to get underway
Manx Care doctor survey to be discussed by Tynwald
Weather warning for snow tonight
MHK queries safety at primary school in Ballabeg
Gales put two ferry sailings at risk tonight
Should the Island throw a birthday party for Barry Gibb?
Warning issued over icy roads
High ground could see 4 inches of snow on Saturday night