Are you positive about those hummingbird ID's? I saw the pictures of their signage in the gallery, but I think they may be incorrect.
Your first picture looks to me like the female fork-tailed woodnymph (Thalurania furcata) that has been there since 2012 (though perhaps moulting, as this new picture shows more ruffed white feathers on the wing?), and your second picture looks to me like an Amazilia hummingbird (Amazilia amazilia), of which the arrival has been shared on social media quite recently.
Neither of the two, to me, look much like Hylocharis sapphirina at all - though it would be wonderful if they still had that species!
Sad news about the parrots though! Seems like an odd change.