jpdb beta

brown rat (Rattus norvegicus); common rat; dark grey (colour, color); dark gray; secret evil-doer

boards covering a ditch (drainage, sewage, etc.); grassroots (e.g. campaign); door-to-door; on the ground

large ditch

boards covering a ditch (drainage, sewage, etc.); grassroots (e.g. campaign); door-to-door; on the ground

boards covering a ditch (drainage, sewage, etc.); grassroots (e.g. campaign); door-to-door; on the ground

ditch with running water; drainage channel

ditch mud

ditch water

Sphaerium japonicum (species of fingernail clam)