It's possible you're thinking of:
* "Sucker-footed" as a descriptor of a bat's feet: This is a loose and informal term. Some bats, like the common vampire bat, have highly modified feet designed for clinging to surfaces. While not technically "suckers," these modifications allow them to hang upside down and move quickly.
* "Sucker-footed" as a misunderstanding of a bat's behavior: Bats use claws and skin membranes for clinging and maneuvering, not suction cups.
To clarify:
* There are no bat species with true "suckers" on their feet.
* The term "sucker footed" is likely an imprecise description.
If you're interested in learning more about bats, please specify what you're looking for. I can provide information on their unique adaptations, species, or behavior.