Peanuts in shells Peanuts in shells for birds is an old fashioned way of feeding the birds. Also known as monkey nuts, they are a firm favouite of squirrels. Thread peanuts together with cotton or string and hang from tree or feeder. Will provide much amusement to birds. Monkey nuts make excellent squirrel food if you wish to keep them away from your feeders. All our peanuts are certified as nil detectable signs of aflatoxin. Always ensure water is available.