"Bull. That is not what it says. Genesis 2:19 clearly says "and every fowl of the air". 'Every fowl' means all of them, and that can't be true if some of them have already been created."
"and every fowl of the air" in the 5th day account. At the end of the 5th day, how many fowl of the air had God created? All of them, or 'Every fowl'.
In 2:19 additional details of Gen 1:26 - 27 are given, which are the creation of man and the animals and birds from the ground. Of every bird that God formed out of the ground on the 6th day, how many did He form? All of them, or 'Every fowl'.
So it stands to reason, if God created all of the fowl of the water on day 5 and all of the fowl of ground on day 6, He created all of the fowl.
"that can't be true"
God's Truth is absolute. Our refusal or inability to see, understand or believe it, does not change it one iota.
But the bible does not say "the fowl of the water", nor does it say "the fowl of ground". What I said to Echo Talon also applies to you: you are reading the bible like a liberal reads the constitution. You are making it up as you go along.