They've never had an official logo.
They've had an association with camels, stemming from O'Reilly's first book about the language, Programming Perl, with a camel on the cover. And that's trademarked.
The Perl Foundation sidesteps it by having a logo of a (pearl) onion, which is also useless because nobody associates with Perl with onions.
So this is perhaps a third way - it's a camel, it's not the camel that might cause confusion with O'Reilly's book.