Do not gut the bird. Rinse off any blood on the feathers with water. Take the bird immediately to your taxidermist or freeze it. Put the bird into a plastic bag for freezing being careful not to damage feathers, including the tail. If the bird's tail feathers do not fit in the bag do not bend them. Let the tail stick out of the bag and tie the bag loosely to prevent damage to the tail.
Do not gut your fish. If you can not take your fish immediately to a taxidermist, wrap it in a very wet towel and put it in a plastic bag, making sure all the fins are flat against the fish's body (to prevent breakage), and freeze it. A fish frozen with this method can safely be kept in the freezer for months.
Note: A fish will loose its coloration shortly after being caught. A good color photograph immediately after the catch may enable the taxidermist to duplicate the natural color tones of that particular fish.