The sign says "New Birds are Here!, This night barrier is in place to protect them".
I have no clue what the new species is.
Grasslands species include black-winged red bishops, blue-naped mousebirds, buff-crested bustards, golden-breasted starling, northern carmine bee-eaters, and violet-backed starlings.
Originally the zoo\'s Reptile House in 1937, Wings of the World features over 50 species of feathered creatures from 15 corners of the world that fly and swim in lavishly planted aviaries and displays that provide habitats as natural as the outdoors. Birds from the Amazon all the way to the Antarctic Coast are displayed. Guests can see owls, macaws, bird-of-paradises, hornbills, parakeets, auklets, puffins and even three species of penguins. Seeing opportunities for zoo visitors as such include two walk-though aviaries, open-fronted habitats, and species behind glass with underwater viewings.