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Table 1.
Sample data for three of the sixteen most commonly searched bird species. I utilize median data because All About Birds lists ranges for body size and egg clutch measurements. All data collected from www.allaboutbirds.org, which is a component of the Cornell School of Ornithology.
Bird SpeciesMedian weight of birdsMedian number of eggs per clutchMedian number of broods per yearTotal number of eggs per year
Northern Cardinal 45 g 3.5 eggs 1.5 broods 3.5 eggs × 1.5 broods = 5.25 eggs per year 
Black-Capped Chickadee 11.5 g 7 eggs 1 brood 7 eggs × 1 brood = 7 eggs per year 
Red-Tailed Hawk 995 g 3.5 eggs 1 brood 3.5 eggs × 1 brood = 3.5 eggs per year 
Bird SpeciesMedian weight of birdsMedian number of eggs per clutchMedian number of broods per yearTotal number of eggs per year
Northern Cardinal 45 g 3.5 eggs 1.5 broods 3.5 eggs × 1.5 broods = 5.25 eggs per year 
Black-Capped Chickadee 11.5 g 7 eggs 1 brood 7 eggs × 1 brood = 7 eggs per year 
Red-Tailed Hawk 995 g 3.5 eggs 1 brood 3.5 eggs × 1 brood = 3.5 eggs per year 
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