Here is information about the bats found in the Amazon, arranged by family:

Emballonuridae
    Rhynchonycteris Naso
           - small
           - live in rocky crevices, caves, trees, hollow logs
           - have more exposed roosts than most other bat families
           - some species live in year-round stable harems, with 2-8 females per male

Noctilionidae

    - feed on insects, some species on fish and frogs
    - roost near water, in hollow trees, and in deep cracks in rocks
    - the Noctilio leporinus species can swim

Mormoopidae

    - small - medium size
    - insectivorous
    - sometimes roost in large colonies, sometimes exclusively in caves
            - Pteronotus parnellii species eats only moths, butterflies, and beetles

Natalidae

    - small
    - often roost in caves or mines
    - have social groups that range in size from very large to less than ten
    - eat exclusively small insects

Furipteridae

    - very small
    - insectivorous (mainly butterflies and moths)
    - live in colonies of about 100 to 150 individuals, sometimes more than 300
    - live in mainly in caves, occasionally in moist areas or logs

Thyropteriae

    - small
    - have suction cups on wrists and ankles
    - roost head up, inside tubes formed as young banana/heliconia leaves unfurl
            - Thyroptera discifera species is insectivorous
            - Thyroptera tricolor species
                    - predators don't usually notice this species
                    - consumes 1 gram of insects a night

Vespertilionidae

    - largest family of bats (in number) with 318 species
    - huge variation in characteristics
    - mainly roost in caves

Molossidae

    - small to moderately large
    - insectivorous, catch prey on wing

all information gathered from:  animaldiversity.ummz.umich.edu/chordata/mammalia/chiroptera.html
                                  and from:  www.press.jhu.edu/books/walkers_mammals_of_the_world/chiroptera/chiroptera.html