Pardon my 1337 but, "LOL".
Where are you finding all these articles, Understudy? Somehow, I don't entirley find this to be a fully reputable source for such information.
TCPalm is a local paper for the Sebastian/ Fellsmere area. It also claims greater coverage. It is a newspaper that gets tossed on your lawn weather you want it or not it has no real subscription base because the paper is free. The paper is usually less than 20 pages.
UPI is a news service. Like the AP (Associated Press) Local and national papers subscribe to them for wire services to get out of area and world wide stories. I worked for UPI years ago doing shuttle launch photography. UPI has gone down hill in the past decade. They are however a legitmate news service.
All Headline News is also a news service be it a very small one. I do not attest to their legitmacy or illegitmacy.
ESPN news is part of the ESPN sports network. Why they posted on this story I can only guess it was a slow news day. They are a legit sports news service. However I think they aren't a very good one.
The Palm Beach Post is the local newspaper to my area. They are a legitmate news service and so far the only one to printthe story about the bee test showing they are not AHBs. A legit newspaper.
However your question is a very good one. And with the internet anyone can claim to be anything. I get newsfeeds based on certain keywords. I do not always get the background on who is giving me the news. I learned the hardway that the British view The Sun (a paper in Britian) like we view the National Enquirer. It is a tabloid paper.
Most of my sources end up being local papers however, because the big papers don't usually want to carry local news events like this because it doesn't help them sell papers.
So don't be afraid to call me out on something I will be more than happy to make corrections.