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
Triangulate cobweb spider person unless an allergic reaction occurs and there is one record of biting humans by this species in France. "S. triangulosa" is a cosmopolitan species, and is found in many parts of the world, including across North America, in southern Russia, New Zealand, and Europe. The spider is believed to be native to Eurasia and introduced elsewhere. This species is primarily a house spider, and builds webs in dark corners of buildings and other man-made structures. Triangulate cobweb spider The triangulate cobweb spider (scientific name: Steatoda triangulosa; also called the triangulate bud spider) is a common spider in the genus