Las Vegas may not have a proper zoo, but there are still places that you can see animals around the Las Vegas valley. Here is a list of some of those places:
Lion Habitat Ranch (lions, giraffe)
Siegfried & Roy's Secret Garden and Dolphin Habitat
Flamingo Las Vegas Wildlife Habitat (flamingos)
Peacocks at Floyd Lamb Park at Tule Springs
The Zoo at Bonnie Springs Ranch (also large turtle pond outside zoo)
Shark Reef Aquarium at Mandalay Bay
The Tank at Golden Nugget (sharks and fish)
Saltwater Aquarium at Silverton (mermaid shows)
Mojave Max at Springs Preserve (also reptiles, amphibians, rabbits, foxes, butterflies)
Bighorn sheep at Hemenway Valley Park in Boulder City
Clark County Wetlands Park (heron, ducks, beavers, coyote)
Moon Valley Nursery/Plant World (multiple birds, turtle pond, 2 giant tortoises)
GilcreaseNature Sanctuary (birds, ducks, chickens, turtles, goats)
Red Rock Canyon National Conservation Area (wildlife)