Please consider joining the Cave Biota of the Philippines mission, http://www.projectnoah.org/missions/9049473 and adding this spotting to the mission.
Here are two sites that may be able to point you in the right direction for an i.d.: http://fm2.fieldmuseum.org/plantguides/guide_pdfs/049-02.pdf
http://archive.fieldmuseum.org/philippine_mammals/species.asp
Using the first sight mentioned, it appears that this is a member of the vespertilionidae family. Good luck!
Comments (10)