The frogs arrive with the new rice. In fact, I think they may be some
kind of amphibious hitchhikers. Farmers get their flats of rice
seedlings in mid-May and by the end of the month these are planted and growing
in 10 centimeters of water. The frogs, by some strange coincidence,
begin singing at exactly the same time.
Where do they come from?
These frogs which inhabit the rice paddies are known as Japanese tree frogs (Dryophytes japonicus), which seems a bit of a misnomer. The German-born
British zoologist Albert Günther is responsible for their scientific name. Who knows where the
common name came from.
I never see these frogs, not in the rice paddies, not in the trees, not
sunbathing on the warm asphalt. They are small (just over 3
centimeters) and mostly a dull beige color, which means they don't stand
out. But there are plenty of smaller creatures with better camouflage
that I see. Moths, for instance.
In six years I have seen just one living frog. (I have seen a few
flattened in the road.) This little guy climbed not a tree but a wall
and made himself a home in my terrace garden three floors up. He
didn't do much, just sat there under my small pine tree like a Buddhist monk
practicing zazen. He stayed for a couple of months and in autumn
disappeared.
While this breed of frog may keep a low profile during the day, they
definitely make their presence known after hours. Beginning around dusk they kick up quite a racket and
don't really let up until dawn. There must be hundreds of them, a sort
of frog convention, everyone talking at once.
But where do they come from?
An early zoological discovery for many children is the tadpole - little
fish that grow into frogs. There are dozens of mini-canals that
criss-cross Katsura, perhaps remnants of a more rural life here. These
may or may not connect to Katsura River; I've never been able to determine
this. Do the tadpoles come to the rice paddies by way of these crude
aqueducts?
The frog convention is usually over by mid-July. The rice paddies go
quiet, peace returns to the night.