サワガニ
サワガニ。天竜フィールドにたくさんいます。雨が降ると活動的になり、宿舎の中にまで入ってきます。この前は実験室の片隅にじっとしてこちらを伺っていました。まもなく冬ですが、石の下にじっと隠れて越冬するそうです。
Japanese freshwater crab (Geothelphusa dehaari) in Tenryu field. We can often see it walking in forests, roads and even in houses. It becomes active on rainy days. In last week, it entered into the laboratory and watched me from a corner of the room. Winter is coming. They pass the winter with remaining in small spaces between rocks.