Here's a more definitive list on "drones" from the database that I could find. It's for the Predator, Global Hawk and the Navy's Fire Scout. They don't seem to show up much at all since I've been watching. Keep in mind this is U.S. only.
ADS-B Exchange - track aircraft live
Finding that database was just awesome because for years I wanted access to ADSB Exchange's database and never could find it. Then again, I didn't try too hard too look either. When I found the database I was like, "Muhahahaha!" And poured through all 113 MB all day. Was pretty cool seeing some of the stuff in there and in my neck of the woods.
Check this out. From yesterday's copy of the database (it's apparently updated everyday at 23:30 UTC), there are 9,332 U.S. military listed aircraft.
If you want anything specific I can pull it for you. The limit in the browser with the comma separated HEX IDs seems to be around 1,000. Beyond that and ADSB Exchange's website throws an error. So I keep it at 1,000 HEX IDs and multi tab in the browser the others. Want all military helicopters? (there's a ton) I can do that. Want all V22's? I can do that. How about C-130's or KC135's or EC-130J's?
Obviously, during war time or whatever they don't have to squawk and use friend or foe technology. That or Mode C which is not something that shows up on ADSB Exchange all that often unless withen a TIS-B source I guess. And I'm wondering if that source to ADSB Exchange is via some FAA API?
Pretty cool stuff and I'm happy to have found it. Keeps me occupied. LOL Well, I'm wanting to deploy Pi-Hole on my OPNsesne router with Cloudflare Access for upstream DNS and Cloudflared for DoT (DNS over TLS) for the smartphone, but I've put it off since I'm not in the mood to tackle it right now. I see you're using Cloudflare for your website. I have been using Cloudflare now for nine, count them 9 years. I block some 624 ASNs and counting. LOL I only allow Google to craw the website. And at that its bot is ASN validated and whatnot. I've seen fake bots try to read my robots.txt file. Ain't happening. HEHEHE Anyway...
Edit-
Here's another website you may be interested in.
Emergency Alerts