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
Hermit thrush Hermit thrush The hermit thrush ("Catharus guttatus") is a medium-sized North American thrush. It is not very closely related to the other North American migrant species of "Catharus", but rather to the Mexican russet nightingale-thrush. The specific name "guttatus" is Latin for "spotted". This species measures in length, spans across the wings and weighs . Among standard measurements, the wing chord is , the bill is and the tarsus is . It is more compact and stockier than other North American "Catharus" thrushes, with relatively longer wings. The hermit thrush has the white-dark-white underwing pattern characteristic of "Catharus" thrushes. Adults