Researchers observing the mammals saw them sharing regurgitated blood with their neighbours.
Tags: animals bats
It is one of Europe's "best wildlife secrets" and home to unique and unusual species.
Tags: environment conservation birds bees nature reptiles animals wildlife wildlife-conservation snakes bats amphibians puffins seals dolphins spiders rspb wolves natural-resources-wales cardiff maesteg swansea st-fagans cardigan ospreys merthyr-tydfil aberystwyth slugs menai-bridge skewen bala new-quay aberdyfi snails caerphilly guillemots razorbills snowdon toads
Scientists explore the home of a bat species that is confined to a single cave in Cuba.
Tags: animals bats cuba
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