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Although a few groups are primarily [[terrestrial animal|terrestrial]], rhacophorids are predominantly [[arboreal]] treefrogs. Mating frogs, while in [[amplexus]], hold on to a branch, and beat their legs to form a foam. The eggs are laid in the foam and covered with seminal fluid before the foam hardens into a protective casing. In some species, this is done in a large group. The foam is laid above a water source so the tadpoles fall into the water once they hatch.<ref name=EoR>{{cite book |editor=Cogger, H.G. |editor2=Zweifel, R.G.|author= Zweifel, Richard G.|year=1998|title=Encyclopedia of Reptiles and Amphibians|publisher= Academic Press|location=San Diego|pages= 99–100|isbn= 0-12-178560-2}}</ref>
The species within this family vary in size from {{convert|1.5|to|12|cm|in|abbr=on}}.<ref name=EoR/> Like other arboreal frogs, they have toe discs, and those of the genus ''[[Chiromantis]]'' have two opposable fingers on each hand. This family also contains the Old World [[flying frog]]s, including Wallace's flying frog (''[[Rhacophorus nigropalmatus]]''). These frogs have extensive webbing between their fore and hind limbs, allowing them to glide through the air.<ref>{{cite web | url = http://amphibiaweb.org/cgi/amphib_query?query_src=aw_search_index&max=200&where-genus=Rhacophorus&where-species=nigropalmatus | title = Rhacophorus nigropalmatus, Wallace's Flying Frog |
==Phylogeny==
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