I love Ranger Goose more than I can put into words.
Does he even know what a goose is? Are there geese in the post-apocalypse? The answer to both is probably not.
The answer to both is actually yes! :]
I had some ideas, so I guess this is as good an opportunity as any to talk about them.
Enclave "experiment" gone wrong like they always do, and released a giant mutant prehistoric bird into the wasteland.
The idea was to de-extinct the quetz by using living animal DNA to do some mad science with. Of course for the purpose of making a weapon, naturally.
I thought it would be fitting or karma at least to have it mutate from the Canada goose. So the remains of the Canadian Air Force can get some revenge on what's left of the USA, especially considering Fallout's alt history.
Basically there's a terror in the skies over the Lone Star State and they have no intention of leaving.