if it was one of these so called 'transitional fossils' then it should have existed long before birds became a species, yes?
No.
You seem to think that the ToE calls for a straight line descent, with each previous species dying out as the next species comes along. This simply isn't the case. At one point in time in the past, there were reptiles. Eventually, some of them evolved into birds, but that process took millions of years. During that process, there was an extended period of time during which reptiles, birds and their transitional intermediates all co-existed.
In essence, your argument is no different from the familiar, "How could we have evolved from apes if there are still apes around?" The only real perplexing thing is why you think you can make the same arguments over and over that have been refuted a thousand times and expect them to eventually convince anyone.
Ridicule is the only weapon which can be used against unintelligible propositions. Ideas must be distinct before reason can act upon them; and no man ever had a distinct idea of the trinity. It is the mere Abracadabra of the mountebanks calling themselves the priests of Jesus. -- Thomas Jefferson
For we know that our patchwork heritage is a strength, not a weakness. We are a nation of Christians and Muslims, Jews and Hindus -- and non-believers. -- Barack Obama
We see monsters where science shows us windmills. -- Phat
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