I've seen game wardens in my area argue about this very topic. You would think there is ambiguity around it, but hunting laws state, at least here in quebec, that possession is total possession (what you have shot during the day + whatever else you have at home, freezer, etc...).

From the conversations I have had with wardens on the topic, the law was passed primarily to control the number of birds taken over the course of a weekend or hunting trip and are more heavily enforced during transport. That said, I wouldn't take any chances.