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Coast foam-nest treefrog, Chiromantis xerampelina
Family Rhacophoridae. Nocturnal. Eggs deposited in a remarkable
foam-nest  constructed overhanging temporary water during rains, larvae drop into water below
after 7-9 days development. Call a quiet, subdued chirp. Can tolerate
very high temperatures and can be found sitting in exposed sunlight. 
More images here. 
Size to 50-60 mm. *photo: J. Vindum