Tail and pouch use by Didelphis marsupialis and Metachirus nudicaudatus (Didelphimorphia: Didelphidae) to carry nesting material. Information about the use of tail to carry nesting material by Neotropical marsupials is poorly documented,Uso de la cola y el marsupio en Didelphis marsupialis y Metachirus nudicaudatus (Didelphimorphia: Didelphidae) para transportar material de anidación