Parakeet regurgitating at nothing?

Hi, sorry if this posted twice, my phone freaked on me.
For some information, I recently got my White-winged Parakeet (also called a Canary winged Parakeet) back in April of 2018 and is now a little over a year old. I’m assuming he’s male but we haven’t got him tested as he’s very scared of people. Despite being against it and not wanting to give the corporation money, I bought him from a pet shop. I “rescued” him in fears of what might happen to him if I didn’t (at that point he had been there for about 3 months). At the time I was already looking into getting another bird as a companion for my Rock / Black-capped Conure, so it worked out.

Recently something has been bothering me though, as he has began making head bobbing movements like he is regurgitating and swallowing it back down. He’s done it to Kai (my conure) which didn’t really concern me, as I can tell he likes her a lot. However, he has began doing it while just sitting in his cage and not even towards a toy. I fear there’s something in his throat or something... He’s not choking, as he can breathe fine and still squawks loudly. Is this normal? Or is it something I should go to vet about?
Again, he’s very skittish of people and I don’t want to scare him more than I have to...

Understand your concern, hard to evaluate without seeing the behavior. Are you able to upload a video of the regurgitation? Best method is via YouTube.

If you have any question, best to seek a certified avian vet, though I understand you don't want to unduly stress him.

My mom bred BeeBee Parakeets for years and years (I love them), and I actually saw a "Hand-Fed" baby at a Petco store a year ago, which surprised me because I had no idea that Petco sold BeeBee Parakeets (though Petco's label on their baby birds of "Hand-Fed" does not equate to them actually being "Hand-Raised" or actually hand-tame, it just means that they were Tube-Fed quickly on an assembly-line at their mass-breeding vendors)...So if you got him/her at Petco or a similar pet shop, then that's most-likely why he/she is not hand-tame...

As Scott said, it's hard to tell you what it is without seeing it...If you could take a video of him/her doing it we can probably give you much better advice...He/She could just be adjusting their Crop, which can look exactly like head-bobbing/regurgitating, they just don't bring anything up...Or he/she could be regurgitating at something you are just unaware of, as since he/she is about a year or so old that means that he/she is most-likely going through puberty right now, which obviously brings along with it a lot of regurgitating...Are you actually seeing stuff being brought-up when he/she is doing this? Usually when they regurgitate, the stuff that they bring-up looks like small bits of bright-white colored solid chunks, that's it, it doesn't look at all like any recognizeable food, just white chunks of solid stuff. In-contrast, when they are vomiting and not regurgitating, the way you can usually tell is that vomiting brings up liquidy stuff that looks more like partially digested food instead of solid little white chunks of stuff. So vomit looks like vomit, where regurgitated food looks like little white, solid chunks with no liquid...

Sorry for late reply. I haven't seen him do it since I've posted this so I can't take a video. When he was doing it, nothing came up from what I saw, which was why I was concerned. I think he is going / went through puberty if that helps. It seems to have stopped, but I'll try to get a video if it happens again.