Rings can cause injuries at the wing skins - if they get infected, they can be fatal for bats without medical care. The ring injuries occur regardless of person who puts the rings on the bats and regardless of the series of the rings. Wild bats cannot get any help so bat rings can be a serious danger to life for the bats.
More information in the new book by Amanda Lollar. We thank Amanda and her team for their tireless commitment to bats. Here you can order the book.
Make your selection in Threads for Bats :
Consequences for bats due to tree felling