Fiddler crab Fiddler crab A fiddler crab, sometimes known as a "calling crab", may be any of approximately 100 species of semi-terrestrial marine crabs which make up the genus Uca. As members of the family Ocypodidae, fiddler crabs are most closely related to the ghost crabs of the genus "Ocypode". This entire group is composed of small crabs – the largest being slightly over two inches across. Fiddler crabs are found along sea beaches and brackish inter-tidal mud flats, lagoons and swamps. Fiddler crabs are most well known for their sexually dimorphic claws; the males’ major claw is much larger than the
Great-billed hermit of eastern Brazil is sometimes considered a separate species: Margaretta's Hermit ("P. margarettae"). Great-billed hermit The great-billed hermit ("Phaethornis malaris") is a species of hummingbird in the family Trochilidae. It is found in Bolivia, Brazil, Colombia, Ecuador, French Guiana, Peru, Suriname, and Venezuela. Its natural habitat is subtropical or tropical moist lowland forest. The taxonomy of this species and the long-tailed hermit is confusing. Most taxa previously consider subspecies of the latter ("insolitus", "moorei", "ochraceiventris", "bolivianus" and "margarettae") are now considered subspecies of the former. A satisfactory taxonomic treatment of the entire "P. longirostris/P. superciliosus/P. malaris" group is still lacking