Cattle Ducks Laws Science 
10,000 Birds
NOVEMBER 3, 2018
It is also a month when the Law of Diminishing Returns over-took itself. Yellow-billed Duck – Anas undulata. Red-billed Duck – Anas erythrorhyncha. Knob-billed Duck – Sarkidiornis melanotos. Indian Spot-billed Duck – Anas poecilorhyncha. Freckled Duck – Stictonetta naevosa.
10,000 Birds
FEBRUARY 3, 2018
A line plotted against the law of diminishing returns describes an increasingly downward curve and a lister’s life is destined to follow that decline. Plumed Whistling-Duck – Dendrocygna eytoni. Black-bellied Whistling-Duck – Dendrocygna autumnalis. Fulvous Whistling-Duck – Dendrocygna bicolor.
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