Machu Picchu Mountain is greener than the Huayna Picchu trail and has many kinds of wild orchids and birds that highlight the path. It is higher than Huayna Picchu, topping out at 10,104 feet.
However, when the female Mallard duck lay eggs, her diet changes to include more animal life than plant matter. In general, Mallards typically eat more plants than animals, and they also eat more plants in the fall and winter seasons. Food selection also has to do with the shape and style of the Mallard's bill.
A grown duck will eat 4-6 ounces of feed per day so I try to measure out the correct amount, but that amount varies by time of year (they eat more in the winter, less in the summer when weeds and bugs are more readily available). Water should always be provided near the feed.