Purple martin / Purpurschwalbe (Progne subis)

Could be a wild guess - MerlinBirdID says purple martin - it says identification features are (in part) best left unidentified. 2023-04-01 14.20.30 Yucatan
Classification: Genus Progne; Family Swallows (Hirundinidae)
General: The purple martin (Progne subis) is the largest swallow in North America. Despite their name, purple martins are not truly purple. Their dark blackish-blue feathers have an iridescent sheen caused by the refraction of incident light^[2] giving them a bright blue to navy blue or deep purple appearance. In some light they may even appear green in color. [more]

First documented observation : 2023-04-01 in Yucatan.