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.
Birds and their droppings can carry over 60 diseases. When it comes to birds, there may be more than just avian flu to be worried about. It has been suggested that there are over 60 other diseases that birds and their droppings can carry. The problem is especially worrisome in residential areas, as many of them are airborne and can be transferred to humans just by being around droppings. Chicken farms can be fairly easily secured.