clutch may weigh ≤80-90% of female body mass: consume 200% of her calcium unitless
||David Ward, Do Polyandrous Shorebirds Trade off Egg Size with Egg Number? Journal of Avian Biology, Vol. 31, No. 4 (Dec., 2000), pp. 473-478 link p.473 right column top paragraph
||Emlen, S. T. and Oring, L. W. 1977. Ecology, sexual selection, and the evolution of mating systems. - Science 197: 215- 223.PubMed ID327542
||P.473 right column top paragraph: "Reproduction is presumably very costly Charadriiformes because commitment to reproduction in shorebirds is high-a clutch may weigh up to 80-90% of a female’s body mass and consume 200% of her calcium (primary source)."