Internet Blogger and Death Metal Band Collapse From Halifax, Canada.
St. Francis Xavier University
Death Metal Record Label Forward Regression Records and the author of Space Command
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This is another example of Phylogenetics, the process used to identify animals that exist in the same family, usually they have similar colors and other common factors and used this map the extinct "dinosaur" Gastronis into the modern bird family making it actually not a dinosaur but extinct modern bird.
Using phylogenetics you can see this in another example in Dogs.
The Dachshund, Doberman and Rottweiler would all be in the same same philogenetic family tree all with the same colors but are different dogs.
In birds the Gastronis would be like the "missing rottweiler" in the dog family like if they had shot all the rottweilers years ago, in the future people may think that was a dinosaur after they forgot people killed them all.
That would "probably" make the gastronis a modern bird in the magpie family that all went extinct like in the dog family with the similar colored dogs Dachshund, Doberman and Rottweiler that are not extinct.