There are various theories to this whodunit happening every day in my edible garden. Could it be the larvae of a type of moth? Snails? Birds? I think it might be birds because the plants were devoured from the top.
Day 4 morning 
Day 3 morning 
Day 2 morning
Day 1
2018/10/28 Update
Last night we decided to play detective. With the torch light of our iPhones, we found the culprit. Not a bird. Not a moth. Not a rat. It is the most common creature in the garden, the snails!
Turns out the cure is really simple. These pellets are called 苦茶粕, the pulp of Camelia tea seeds after the oil is pressed. Snails hate them.
