Bronx Zoo's Jungle World. There are 2 males in the waterfall pools with gharials, Heosemys grandis, and a Geoclemys hamiltonii. When I visited in February they were not mature yet, so I didn't see the cool head colors.
@RatioTile Thank you! I hadn't visited yet this year before the lockdown so didn't get to see them... Hopefully they'll still be on-display when the zoo reopens.