Peanuts in Shell or Monkey nuts as they are sometimes known, is the complete peanut including the shell from which Peanut Kernels are extracted. In terms of offering these nuts to the garden birds, they are often strung together with string and hung from a tree. The wild birds then like to chip their way through the outer shell in order to get to the peanut kernel. It is also important to remember that squirrels really love these nuts, so if you want to attract squirrels to your garden, then these nuts in shells are great.