Globally bats (Order : Chiroptera) comprise around 20% of all mammal species, but this percentage rises in Southeast Asia where, at least locally, bats may comprise around 40% of all mammals.  The play an important role in pollination and seed dispersal in Southeast Asia's forests, yet remain amongst the least studied of the regions mammals.

Included here are examples of the huge Flying Foxes which can weigh over 1 kg and have wingspans of almost 1.5 metres, and the tiny Whiskered Myotis which hides amongst bamboo leaves and weighs just 6 grams. Larger bats are generally frugivorous (fruit eating), while smaller species tend to be insectivorous (insect eating).  Blood-sucking vampire bats do not occur in Southeast Asia, but are confined to Central and South America.

Mega-colonies of Miniopterus or Bent-winged bats  occur where limestone caves afford sufficient roosting space. In parts of  Borneo such colonies may number over 100,000 individuals.
 

Fruit and Nectar Bats  (Pteropodidae)

Island Flying Fox		Spotted-winged Fruit Bat		Lesser Dog-faced Fruit Bat		Cave Nectar Bat

Sheath-tailed Bats  (Emballonuridae)

False Vampires  (Megadermatidae)

Lesser Sheath-tailed Bat		Black-bearded Tomb Bat		Pouched Tomb Bat		Lesser False Vampire

Hollow Faced Bats  (Nycteridae)

Horseshoe Bats  (Rhinolophidae)

Hollow-faced Bat				Blyth's Horseshoe Bat		Lesser Woolly Horseshoe Bat		Trefoil Horseshoe Bat

Roundleaf Bats  (Hipposideridae)

Great  Roundleaf Bat		Intermediate Roundleaf Bat		Shield-faced Roundleaf Bat

Evening Bats  (Vespertilionidae)

Small Woolly Bat		Bent-winged Bats		Whiskered Myotis		Asiatic Lesser Yellow Bat		Lesser Bamboo Bat
Greater Bamboo Bat