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Arthropods (/ ˈ ɑːr θ r ə p ɒ d / ARTH-rə-pod) [24] are invertebrates in the phylum Arthropoda.They possess an exoskeleton with a cuticle made of chitin, often mineralised with calcium carbonate, a body with differentiated segments, and paired jointed appendages.
The water-plantains (Alismataceae) are a family of flowering plants, comprising 20 genera (17 extant and 3 fossil) and 119 species.The family has a cosmopolitan distribution, with the greatest number of species in temperate regions of the Northern Hemisphere.
The black swan (Cygnus atratus) is a large waterbird, a species of swan which breeds mainly in the southeast and southwest regions of Australia.Within Australia, the black swan is nomadic, with erratic migration patterns dependent on climatic conditions.