ИЗ ПУШКИ ПО ВОРОБЬЯМ НЕ СТРЕЛЯЮТ
Do not take extreme measures to get rid of something quite trivial See За мухой не с обухом, за комаром не с топором (3), Орлом комара не травят (O) Cf: Don't take a hatchet to break eggs (Am.). Never take a stone to break an egg, when you can do it with the back of your knife (Br.). Send not for a hatchet to break open an egg with (Br.). Take not a musket to kill a butterfly (Br.)