That heron? Probably not a Lava Heron after all.

Panama Records Committee Chair George Angehr chimes in on Venicio’s odd Butorides from Las Bóvedas:
Interesting bird. However, I showed it to heron expert James Kushlan and he said that Lava Heron has a thicker bill and thicker legs. Photos on line also seem to show that Lava Heron has a yellow eye. Kushlan thought it was just a melanistic Green/Striated.