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
Brown spider monkey Brown spider monkey The brown spider monkey or variegated spider monkey ("Ateles hybridus") is a critically endangered species of spider monkey, a type of New World monkey, from forests in northern Colombia and northwestern Venezuela. Its taxonomic history has been confusing, and in the past it has been treated as a subspecies of either the Geoffroy's spider monkey or the white-fronted spider monkey. Like all spider monkeys, it has very long, spindly limbs and a lengthy prehensile tail which can almost be called a fifth limb. The brown spider monkey has a whitish belly and patch on the forehead, and