Only know use wild bird in regular military tactics had place during IWW when Royal Navy try teach sea birds to fly near german submarines. Ships haul models look like submerged submarine kiosk, but with hooked meat or fishes. This would encourage the birds to fly in the vicinity of submarines in anticipation of the prize (and the British to facilitate their detection). Idea was quickly abandoned due to zero effectiveness.

Other idea?

Birds are great in spread illness like bird flu what can destroy raising of poultry (really effective source of meat during wars) in country and spread costful epidemies, but overall it's too dangerous for attackers. Bird flu and other diseases spread by migration species easily can get on your or allies farms and then both sides had food shortages and epidemies among society. Although it would not be surprised if someone had analyzed this possibility, especially as the United States and the Soviet Union planned to drop on enemy territory aggressive variety of cereals mushrooms to destroy the production of cereals.