Uda Walawe is undoubtedly the best place in Sri Lanka to see wild Asian Elephants throughout the year. Unlike other parks, Uda Walawe does not have a seasonal variation in elephant numbers and it is easy to encounter a few of them at any time of the year. Morning and evenings are the best time to visit the park and late evenings give the best lighting for photography with amazing sun sets. Other mammals that can be seen include Wild Boar, Spotted Deer, Barking Deer, Jackal, Samber, Water Buffalo, Black-naped Hare, the endemic Toque Macaque and Gray Langers. If lucky, you can also see Leopard and some of the other smaller cats like Fishing cat & Jungle cat.
Uda Walawe can be one of the best places to see the dry zone avifauna of Sri Lanka. By spending just two days in the park you can easily see over a 100 species during the migrant season. Uda Walawe is specially known for its many species of Raptors. Some of the common birds seen include Spot-billed Pelican (Globally threatened) Little Cormorant, Grey Heron, Indian Pond Heron, Cattle Egret, Large Egret, Little Egret, Intermediate Egret, Painted Stork, Woolly-necked Stork, Yellow-wattled Lapwing, Green Bee-eater, Crested Tree-swift; Common, White-throated, Pied and Stork-billed Kingfisher; Orange-breasted Green Pigeon, Ceylon Green Pigeon, Ceylon Grey Hornbill, Crimson-backed Woodpecker, Black-shouldered Kite, Brahaminy Kite, White-bellied Sea Eagle, Grey-headed Fish Eagle, Serpent Eagle, migrants include Booted Eagle, Common Kestral, Harries, Rosy Starlings, Black-capped Kingfisher, Wood Sand Piper, Common Sand Piper, Little Ringed Plover, Whiskered Tern, Yellow Wagtail, Forest Wagtail & Citrain Wagtail.