food reserve

Birds pluck their prey's feathers and put them in stone 'prisons'
The Eleonora falcon on Mogador island captures other small birds alive, plucks their flight feathers and stuffs them into rock crevices as a reserve food source.
Many people use this bag to pack food, but most are doing the wrong way
The type of bag we are talking about is a zip lock plastic bag. So, so far, have we done wrong?