In the food preparation room in the hummingbird house, they have a whiteboard with the species they keep listed, and I noticed during my visit yesterday that it seems to say "Chestnut-breasted coronet" under that piece of paper to the left! This species is not on show though.
Also, I noticed that someone has reported several of the species that have not been on-show for years as "seen and signed" on Zootierliste - these observations do not seem to be correct, or the person got a tour behind the scenes or something. Some examples of these are Wreathed hornbill (Rhyticeros undulatus), Luzon hornbill (Penelopides manillae manillae), Mindanao wrinkled hornbill (Rhabdotorrhinus leucocephalus) and Moluccan metallic pigeon (Columba vitiensis halmaheira) - They do have a Philippine metallic pigeon (Columba vitiensis griseogularis) on show though, so the last one could just be a mix up.
Also, I noticed that someone has reported several of the species that have not been on-show for years as "seen and signed" on Zootierliste - these observations do not seem to be correct, or the person got a tour behind the scenes or something. Some examples of these are Wreathed hornbill (Rhyticeros undulatus), Luzon hornbill (Penelopides manillae manillae), Mindanao wrinkled hornbill (Rhabdotorrhinus leucocephalus) and Moluccan metallic pigeon (Columba vitiensis halmaheira) - They do have a Philippine metallic pigeon (Columba vitiensis griseogularis) on show though, so the last one could just be a mix up.