Hmm, I read it on this site:
http://www.stelzriede.com/ms/html/mshwpmn2.htm#ditchIt's the bombardiers duty for taking care of the pigeon:
'Bombardier
Jettisons bombs, closes bomb bay doors, destroys bombsight, goes to radio compartment, closing compartment door. Takes first-aid kits to radio compartment.
Takes position, partially inflates life vest by pulling cord on one side.
Directs and assists exit of men through radio hatch. Stands above and forward of hatch and receives equipment from navigator and hands it to crew members as follows: signal set and radio to radio operator; ration kit No. 1 to tail gunner; ration kit No. 2 to right waist gunner; navigation kit to ball turret gunner;
pigeon crate to left waist gunner . Assists flight engineer in making exit.
Goes to right dinghy.'