Unlike mammals that are shy and primarily nocturnal, birds and reptiles are much easier to see in their native habitat and the Old Abbot’s cave provides plenty of habitat for a wide range of species of both groups. It is the only place in entire country that I have ever seen the Chestnut-winged cuckoo (Cculus sparverioides).
Some of the species commonly seen at the mountain are: Rufous treepie, Black treepie, Sprangled drongo, Gray drongo, Rachet-tail drongo, Bronzed drongo, Green-billed malkoha, Common Asian koel and Greater coucal.
Puff-throated babler, Crested bulbul, Sooty-headed bulbul, Strea-eared bulbul, Black-naped monarch, Asia paradise flycatcher, Bar-winged flycatcher shrike, Grey-headed flycatcher, Sulphur-breasted warbler, Inornate warbler, Yellow-browed warbler and Common tailorbird.
Rubby cheeked sunbird, Common iora, Golden-fronted leafbird, Scarlet minivet, scarlet-backed flowerpecker, Woods wagtail, Rufous woodpecker, the rare Limestone babbler, Lesser necklaced laughing thrush and Collared owlet.
The most colorful reptiles on the mountain are the Green whip snake and Mustached or Blue-crested lizard, though the Garden fence or Changeable lizard can sometimes display some surprising colours during the breeding season. The other common reptiles are Cave-dwelling snake, Green tree snake, Mountain bronzeback, Monocellate cobra, Kanburi pit-viper, Butterfly lizard, Speckled forest lizard, Tokay lizards, Spiny-tailed, fat-tailed and Siamese leaf-toed gecko.
No tropical ecosystem is without its fair share of invertebrates and the Abbot’s mountain is no exception.