Red-Billed Wood Hoopoes
These birds look blue to me, but they have a hint of green sheen in certain lights, from which arises their newer name "green wood hoopoe" (Phoeniculus purpureus). They live in tropical Africa.
8942green wood hoopoePhoeniculus purpureustropicalbirdAfricaPhoeniculidaewood hoopoeredbilled wood hoopoe
From Nashville Zoo