the idea is that it was originally a local population of various anomalous corvids that lived in a single forest (but would fly outside of that range to capture the attention of the local people). my problem with containment perimeters is that they are not only costly, but also not very effective against flying birds whos main source of food lies outside of that perimeter. they only were able to become widespread after the foundation tried to contain their effects with a limited budget, which backfired immensely. its not that the foundation is stupid, its that they don't have a crapton of money to feasibly contain them.
the working idea for the structure of the article went along these lines:
there would be 4 article revisions, all hidden under collapsibles, for each revision. The new information added would be bolded, and information retracted would be struck through:
Revision 1. Euclid - Because its both costly and most likely impossible to capture or exterminate all SCP-XXXX instances, SCP-XXXX are contained by simply giving the population food, reducing their impact on surrounding civilization to a negligible amount.
Revision 2. Keter - SCP-XXXX must be given food to prevent retaliation against the surrounding civilization.
Revision 3. Keter - SCP-XXXX food has been laced with a toxin that either sterilizes them or acts in a similar way to DDT, making it next to impossible for them to reproduce effectively. They don't realize that the food is the problem because they aren't aware of the actual toxic effects until long after they eat it.
Revision 4. Euclid - SCP-XXXX is limited to only a few individuals contained within the Foundation for research, all tagged with trackers so SCP-XXXX can never become widespread again.
That being said, there is a compelling case for it to be a tale instead of an SCP article. I'll definitely consider that.
oh, and I also called them "bastard crows" because i thought it was funny. thats not the actual title the scp would be given, im still working on that