(A) At the time of examination, branches (twigs and leaves) expanded over the pond contained 11 foam-nests of Z. arboreus. Among these, 1 foam-nest was recognized at a branch approximately 8 m high (maximum height of oviposition site); 1 foam-nest, at the base of a branched tree less than 3 m high; and 1 foam-nest, floating on the water surface of the pond. We heard of mating calls by 2 males around the pond. A goldfish was swimming in the pond.

(B) Enlargement of a foam-nest.

Within the same park, a series of choruses at least by 4 males of Z. arboreus were harmonized around the Uchibori-ishigaki, a stone wall of an inner canal, but no foam-nest was found throughout. Also, we heard of some call by Dryophytes japonicus (formerly Hyla japonica).

Accompanied Collaborator: Masahiro Nakagawa (Kinki University).