This striking bird is seen occasionally in my garden, but Maquenque Ecolodge is still my #1 place to see and photograph the Groove-billed Ani (my gallery link) and in more interesting situations including a photo of a family of 8 Groove-billed Anis lined up together on a fence! 🙂
And yes, there is a Smooth-billed Ani (my gallery link) that books say is seen only along the South Pacific Coast where the Groove-billed is not usually seen but I have a shot from the South Caribbean from where others have posted photos on iNaturalist, plus iNat shows some reported in the Northern Central Valley hills. They are still more rare than the Groove-billed which is literally seen all over Costa Rica up to 1,500 feet altitude. 🙂
¡Pura Vida!