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. 2014 Jun 25:75–82. doi: 10.1016/B978-1-4557-7397-8.00009-8

TABLE 9-1.

Morphologic and Reproductive Aspects of Ratites

Ostrich Emu Rhea Cassowary Kiwi
Size (m) 2.5–3.0 1.5–1.8 1.5–1.7 (Common> Darwin's) 1.7–2.0 0.3–0.6

Max. weight (kilogram [kg]) 120–160 38–55 25 60–85 1–4

Gender size M > F F > M M > F F > M F > M

Breeding strategy Polygamous Paired for breeding Polygamous Paired for breeding Paired for life

Eggs No/female/year <100 7–20 10–15 3–6 1–3

Color cream dark green granular yellow- greenish light, bright green white

Weight 1–2 kg 500–700 grams (g) 400–600 g 600–700 g 400–500 g

Incubation (days) 39–44 56–61 39–42 60 71–78 (–92)

Incubating partner M (night), F (day) M M M M

Parental care M (+F), 1 year M M, 4–6 months M M (+ F)

M, Male, F, female.

From Del Hoyo J, Andrew E, Sargatal J: Order Struthioniformes. In Del Hoyo J, Elliott A, Sargatal J (eds): Handbook of the birds of the world, Volume 1, Barcelona, Spain, 1992, Lynx Editions.