Fiddler crab a vital role in the preservation of wetland environments; by sifting through the sands, they aerate the substrate and prevent anaerobic conditions. Fiddler crabs live rather brief lives of no more than two years (up to three years in captivity). Male fiddler crabs use the major claw to perform a waving display as a form of female courtship. Females choose their mate based on claw size and also quality of the waving display. In many fiddler crab species, the female occupies the burrow of their mate while she lays her clutch of eggs. Research shows that the male major claw
Planalto hermit be of Least Concern by BirdLife International. Planalto hermit The planalto hermit ("Phaethornis pretrei") is a species of bird in the family Trochilidae, the hummingbirds. It is found in eastern and south-central Brazil, eastern Bolivia, Paraguay, and marginally in north-western Argentina. It is usually easily recognized by its relatively large size, broad white tips to all the rectrices, and cinnamon-buff underparts and rump – the latter contrasing clearly with its tail and remaining upperparts. This is essentially a non-forest hermit, being found in a wide range of open and semi-open habitats, including Caatinga, Cerrado, and the Pantanal. It is widespread