I have visited the Bronx Zoo on Sunday. Did not take too detailed notes, but here is the summary.
Due to the cold weather, most of the tropical species were off exhibit. The only species on view in the Congo Gorilla Forest were those that can be seen indoors: Wolf's guenons, birds (I saw Congo peacock, white-crested hornbill, African pygmy goose, and Guinea turaco), and reptiles/amphibians/fishes/inverts (I did not take a complete list but I definitely saw African rock python, Ornate monitor/black mud turtle, ball python, Calabar ground python, African bullfrog, clawed frogs, African lungfish, goliath beetle, and other fishes and inverts). Gorillas were inside, and I caught a glimpse of 2 sleeping ones in their indoor exhibit room - all others were off exhibit. Species on exhibit in Madagascar were more a less same as what I saw during my last visit in 2016: Coquerel's sifakas, ring-tailed, collared, and red ruffed lemurs, ring-tailed mongooses, fossas, Nile crocodiles. I also saw 2 mouse lemurs (first time for me), Madagascar ground boa, Madagascar tree boa, Madagascar hognosed snake, tomato frog, also radiated and spider tortoises. I know that zoo sometimes rotates crowned lemurs with sifakas, and I'd love to see a crowned lemur, but both times I visited Bronx (in 2014 and this week) only sifakas were on view. Most of the African species were off exhibit - in fact the only African animal I saw outdoors was a male gelada and a hyrax. Giraffes could be seen in their indoor building, and I also saw an active aardvark, dwarf mongooses, and Decken's hornbills building, but the Maxwell's duikers are apparently gone. In Jungle World I saw a single Matschie's tree kangaroo, small-clawed otters, Javan langurs (I only saw 3), silvered langurs, a (very active) Malayan tapir, 2 black leopards, tree shrew, Indian flying foxes, Sri Lankan junglefowl (first for me!), scaly-sided mergansers, Fly River turtle, giant gouramis, and some herps and inverts (I remember seeing mangrove snake, Timor python, spotted climbing toad, Bornean eared frog, and Roti Island snake-neck turtles). I spent some time trying to see pygmy slow lorises and greater chevrotains, but they were hiding.