Editing Frog (section)

=== Climbing ===
[[File:Phyllomedusa burmeisteri01.jpg|thumb|alt=Frog climbing|[[Phyllomedusa burmeisteri|Burmeister's leaf frog]]]]
[[File:Glass frogs.jpg|thumb|Group of [[glass frog]]s]]
Tree frogs live high in the [[canopy (biology)|canopy]], where they scramble around on the branches, twigs, and leaves, sometimes never coming down to earth. The "true" tree frogs belong to the family Hylidae, but members of other frog families have independently adopted an arboreal habit, a case of [[convergent evolution]]. These include the [[glass frogs]] (Centrolenidae), the [[Hyperoliidae|bush frogs]] (Hyperoliidae), some of the narrow-mouthed frogs (Microhylidae), and the [[Rhacophoridae|shrub frogs]] (Rhacophoridae).<ref name=Britannica/> Most tree frogs are under {{convert|10|cm|in|0|abbr=on}} in length, with long legs and long toes with adhesive pads on the tips. The surface of the toe pads is formed from a closely packed layer of flat-topped, hexagonal [[epidermis (skin)|epidermal]] cells separated by grooves into which glands secrete [[mucus]]. These toe pads, moistened by the mucus, provide the grip on any wet or dry surface, including glass. The forces involved include [[boundary friction]] of the toe pad epidermis on the surface and also [[surface tension]] and [[viscosity]].<ref>{{cite journal |author1=Federle, W. |author2=Barnes, W. J. P. |author3=Baumgartner, W. |author4=Drechsler, P. |author5=Smith, J. M. |year=2006 |title=Wet but not slippery: boundary friction in tree frog adhesive toe pads |journal=Journal of the Royal Society Interface |volume=3 |issue=10 |pages=689–697 |doi=10.1098/rsif.2006.0135 |pmc=1664653 |pmid=16971337}}</ref> Tree frogs are very acrobatic and can catch insects while hanging by one toe from a twig or clutching onto the blade of a windswept reed.<ref>{{cite book |title=Living Amphibians of the World |last=Cochran |first=Doris Mabel |year=1961 |publisher=Doubleday |isbn=978-0-241-90338-4 |page=112 |url={{Google books|HOk6AAAAMAAJ|page=112|plainurl=yes}} }}</ref> Some members of the subfamily [[Phyllomedusinae]] have [[Opposable thumb#Opposition and apposition|opposable toes]] on their feet. The [[Phyllomedusa ayeaye|reticulated leaf frog]] (''Phyllomedusa ayeaye'') has a single opposed [[Digit (anatomy)|digit]] on each fore foot and two opposed digits on its hind feet. This allows it to grasp the stems of bushes as it clambers around in its riverside habitat.<ref>{{cite web |url=http://amphibiaweb.org/cgi-bin/amphib_query?where-genus=Phyllomedusa&where-species=ayeaye |title=''Phyllomedusa ayeaye'' |publisher=AmphibiaWeb |access-date=June 14, 2012}}</ref>