The Johns Hopkins University Press. All rights reserved. This document may be used, with this header included, for noncommercial purposes within a subscribed institution . No copies of this work may be distributed electronically outside of the subscribed institution, in whole or in part, without written permission from the JHU Press . The upper parts are grayish or various shades of brown, sometimes with a reddish or cinnamon cast.
Some species have whitish spots on the body.
The underparts are creamy, pale brown, or white. Males of the species T. longimanus are usually cinnamon brown in color, whereas most females of this species are dark gray. A wing pocket or pouch is present in all species. Most species also have a glandular sac in the lower throat. This sac is more highly developed in the males than in the females and may be entirely absent in the latter.