I recommend trying a baking soda paste. Mix a bunch of baking soda with a small amount of water to form a thick paste, cover the area where the bird was with the paste, let dry. the past should begin to absorb the stink. after this is dry you can vacuum it off or sweep it off... you may have to try this two or three times. but i have used this with the smell of blood (long story about an accident)...in pants. Another way would be to make a very thick paste out of corn starch, spread on the area, let dry (this will take hours) then vacuum it up.... i think that the corn startch is harder to get off the area afterwards, you may have to steam clean it again after that.... (the stuff is like cement)... good luck to you