The Acanthoscurria geniculata (Giant White Knee), is a species of tarantula native to forests of Brazil. It is commonly referred to as the Brazilian giant whiteknee tarantula as a homage to its brilliant black and white banded legs. This is a medium-large species, fast growing and taking up to 3-4 years to reach a mature legspan of 8.5 inches for females, slightly less for males.
Megaphobema robustum, known as the Colombian giant tarantula or Colombian giant redleg, has a span of 6 to 8 inches. Found in the tropical rainforests of Colombia and Brazil near logs, it will eat crickets, other large insects, small lizards and various mice. It is known for its defensive behavior.