I think that this is a Black-capped Lory (Lorius lory). They seem to be compatible with the Trichoglossus lorikeets - the Oklahoma City Zoo had two or three in their lorikeet exhibits for nearly 15 years.
@Chlidonias Thank you! That makes a lot of sense! I was wondering why the tail was so long, but I chalked it up to individual variation! I would hope that they wouldn't hybridize these lories on purpose, but it's possible that a Trichoglossus lorikeet interfered with a pair of Black-capped Lories (or vice versa!). The Oklahoma City Zoo had a trio of Black-capped Lories in their lorikeet exhibit for many years (roughly 2005 through last year when the last bird passed away). Apparently, Black-capped Lories are at least somewhat compatible with Trichoglossus lorikeets unlike so many other species (they had poor compatibility with the Dusky and the Red lories that they tried). Thanks again!