These things are not birds. To call them birds is insane, except if you're using the euphemism for "aircraft". Otherwise you and the other so-called "debunkers" with their convoluted logic are saying "I sitting at my computer am right, but all these government officials, scientific instruments, military personnel and civilians, they're wrong". Definition of crazy.
They're craft from unknown origins reported by multiple highly credible witnesses and systems and now being revealed to the public in a concerted way from the Navy, and former DoD and intelligence officials.
The narrative on this topic has changed, it's time to get up to date on the new perspective which is not ridicule but curiosity.
Take a look at these recent articles:
https://www.foxnews.com/science/christopher-mellon-official-...
https://www.washingtonpost.com/outlook/2019/05/28/ufos-exist...
https://nypost.com/2019/05/29/ufos-have-come-out-of-the-frin...