  We investigate the movement patterns of three different Neotropical
marsupials in an unfamiliar and risky environment. Animals are released in a
matrix from which they try to reach a patch of forest. Their movements,
performed on a small spacial scale, are best approximated by L\'evy flights.
Patterns of oriented and non-oriented individuals - with forest patches within
or beyond their perceptual range - differ only slightly in the value of their
exponents. These facts suggest that, for these species, the appearance of
L\'evy flights is the product of animals innate behaviour that emerges
spontaneously, as a neutral characteristic proper of a default movement mode
for alerted animals.
