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Table 2 Reported reproductive parameters between grouse species

From: Egg laying and incubation rhythm of the Chinese Grouse (Tetrastes sewerzowi) at Lianhuashan, Gansu, China

Species Body weight (g) Egg laying interval (h) Clutch size Egg weight (g) Incubation (days) Incubation constancy (%) Number of daily recesses Recess duration (min) Referencesa
Chinese Grouse (Tetrastes sewerzowi) 327.4 49 6.19 20.5 28–31 92.8 5.0 20.25 1
Willow Ptarmigan (Lagopus lagopus) 525–652 24 7.1, 10.2 23 21–22     2, 3
White-tailed Ptarmigan (Lagopus leucurus) 329 26–44 5.9 21 22–23 95.7, 93.9 3.07   2, 3, 4
Rock Ptarmigan (Lagopus mutus) 427–701 36 6.6 21 21     2, 5
Ruffed Grouse (Bonasa umbellus) 500–586 36 11.5 19 24 96 2.0 20–40 2, 6, 7
Hazel Grouse (Tetrastes bonasia) 370–422 31 8.3 19 23–27 95 2.0 33 2, 8, 9
Blue Grouse (Dendragapus obscurus) 813–867   6.37 33 26     2
Greater Sage-grouse (Centrocercus urophasianus) 770   12 24 26.5 96.1 2.2 26.5 2, 10
Spruce Grouse (Dendragapus canadensis) 456–620   5.8, 7.54 23 21–25    26.4 2, 11
Capercaillie (Tetrao urogallus) 1755–2004   7.07 48 24–28    35 2
  1. aThe references refer to as follows: 1. Sun (2000), 2. Johnsgard (1983), 3. Wiebe and Martin (1995), 4. Wiebe and Martin (1997), 5. Watson (1972), 6. Bump et al. (1947), 7. Maxson (1977), 8. Semenov-Tyan-Shanskii (1960), 9. Müller (1992), 10. Coates and Delehanty (2008), 11. Naylor et al. (1988)