Wisdom of the Wild: A wildlife film with a difference: it has A Message for any humans in the house. "The squirrel in the tree, the fox below, the birds, insects, all know that a time of plenty will not last forever". Austerity-stricken wartime viewers can learn from their economical feeding habits. An entertaining hybrid of public information and natural history from the makers of wildlife series Secrets of Life. Released in the BFI boxset Ration Books and Rabbit Pies: Films from the Home Front.