But, from these three colors, you can mix all colors found in the spectrum. Selecting Three Primaries. Probably the best way to choose primary colors is to browse through various art instruction books until you find an artist that sees, and interprets, color in the same way as you do. Deciding on which three primary watercolors to begin with can seem quite daunting, especially if you are new to watercolor.
144 Field Manual of Wildlife Diseases: Birds Figure 16.4 During the 1973 outbreakof duck plague at Lake Andes NationalWildlife Refuge in South Dakota, morethan 40,000 mallards died. Photo by Milton Friend from adjacent Flanders Bay, apparently as a result of diseasetransmission from white Pekin ducks.ittle is known about the response of wild water-fowl to strain differences.Duck plague outbreaks are thought to be caused whenbirds that carry the virus shed it through fecal or oral dis-charge, thus releasing the virus into food and water withwhich susceptible birds may have contact.
Pekins start laying eggs when they are about 26â28 weeks of age and can be kept economically for about 40 weeks of production, when they will have laid about 160 eggs. Egg production and overall performance is best if breeding ducks are housed together in groups no bigger than 250 birds.