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
Stripe-throated hermit been considered a subspecies of the little hermit ("P. longuemareus"), but morphological data suggest it may be closer to the grey-chinned hermit ("P. griseolaris"). At present most, if not all, major authorities accept the split (SACC, the Clements check list, the Howard & Moore check list, etc.). It has been suggested that the mainly Central American taxon "saturatus", which typically is considered a subspecies of "P. striigularis", may deserve species status, in which case it would become the dusky hermit or Boucard's hermit ("P. saturatus"). The taxon "adolphi" is considered a junior synonym of "saturatus" by most authorities. It occurs