Whenever we have a few days rain the little creek in the wilderness fills up, and then the frogs make high holiday. Most people will tell you that a frog croaks, and leave it at that. But, as a matter of fact, in proportion to their numbers, there is as great a variety in frog songs as in birds’. Once you have realized the differences you will wonder however you were so stupid as to think them all the same. There is the deep “Craw-craw, craw-craw” of the big green tree-frog, _Hyla coerulea_; the familiar chant, “Craw-awk, crawk, crok, crok,” of the golden tree-frog, _Hyla aurea_--I give you their scientific names because they are so charming--the slow “Kuk-kuk-kuk,” and the high, piping, hurried “Cree-cree-cree-cree” of two other _Hylas_. Then there is the insect-like “Crikik, crikik” of the little brown _Crinia_, and the harsher “creek” of the tiny brown toadlet. The two frogs which rejoice in the name of _Limnodynastes_, “King of the pool,” have quite different notes. One has an explosive “Toc, toc, toc,” like a machine gun, and the other calls “Kuk-kuk-kuk-kuk.” Then the funny old burrowing frog calls softly “Oo-oo-oo-oo,” and sounds more like a bird than a frog. On fine mornings after rain, when the croakings overnight have told me what is afoot, I visit the little creek to see which of the frogs have spawned. A patch of froth, like soapsuds, with tiny spheres of black and white embedded in it, is the egg-mass of one or other of the two species of _Limnodynastes_. Two kinds of eggs are neatly arranged in cylindrical bunches round the submerged roots and grasses. Each egg is surrounded by a sphere of clear jelly, and a thin gelatinous matrix envelopes all the eggs. Those of _Crinia_ are black and white, those of _Hyla ewingi_ brown and cream. Floating on the surface, as if peppered over it, are the brown-and-white eggs of _Hyla coerulea_; while hidden under the debris round the edges of the water I find the much larger eggs of the little _Pseudophryne_, twenty to a nest, with the gaily orange-marked mother toadlet in attendance. [Illustration: _A balloon almost as big as the frog itself_]