Cf: Hedges have eyes, and walls have ears (Am., Br.). Hedges have eyes and woods have ears (Br.). The wall has ears and the plain has eyes (Am.). Walls have ears (Am., Br.)
Русско-английский словарь пословиц и поговорок. Академик.ру. 2013.
Русско-английский словарь пословиц и поговорок. Академик.ру. 2013.