Caspian sneaks off towards the copse of trees as the others hang back to give him room. Approaching quietly, he sees nothing at first, but as he gets within knife-throw a flock of birds takes flight noisily from the copse and he sees a jumble of branches, leaves and wagon remains partly concealed and camouflaged within the copse. The wheels are off and it is partly chopped as though with axes or or heavy swords. The cargo of barley is scattered and dumped on the earth, the birds were having a feast.
Yes, everyone saw the birds alight.