Weight span in Ratites

Range kiwi 1kg: ostrich 130kg kg
Organism Birds
Reference Dennis M. Power, Current Ornithology, Chapter 1, J. David Ligon, The Role of Phylogenetic History in the Evolution of Contemporary Avian Mating and Parental Care Systems pp.1-46 p.7 3rd paragraph
Comments P.7 3rd paragraph: "In the ratites and tinamous, exclusive male parental care is the rule (Handford and Mares, 1985). There are 10 living species of ratites, including the Ostrich (Struthio), two species of rheas (Rhea), three species of cassowaries (Casuarius), the Emu (Dromaeus), and three species of kiwis (Apteryx). The kiwis, cassowaries, and Emu are thought to be monogamous. Ratites vary greatly in size, are found in a diverse array of habitats, and differ greatly in their ecologies, e.g., forest dwelling, slow-moving nocturnal kiwis weighing as little as 1 kg at one extreme, and open-country, fastrunning, diurnal Ostriches weighing up to 130 kg at the other."
Entered by Uri M
ID 113077