In the end having a few small animals is not all that exacting on the environment, you just need a small pond, and a few trees to keep them happy--that's why you can still hear frogs croaking in the suburb.
畢竟還是有些小動物對環境並不苛求，只要一個小水池、少許植被就心滿意足，這也是都市郊區仍蛙鳴處處的原因。