Concentrations of waterfowl result in a large quantity of bird droppings. Droppings contain phosphorus, which can contribute to algae growth in water. Additionally, waterfowl droppings may also contain bacteria and viruses. Waterfowl are hosts of the familiar parasite that causes swimmer's itch. Feeding waterfowl, particularly around beaches and docks, may contribute to swimmer's itch; reducing the recreational quality of these public areas. If you are in an area where waterfowl congregate be sure to wash your hands thoroughly and make sure pets and children do not ingest waterfowl droppings.
An additional source of nutrient is waterfowl.
It takes only 0.1 ppm of phosphate or 5 -7 ppm of nitrate to reduce your water quality and thus the enjoyment of your pond. Research shows that it takes 4.2 ducks per surface acre per year to produce this much nitrates and only duck surface acre per year to produce the minimum phosphate. This means that if your one-acre pond has as few as five resident ducks, they could be producing enough nitrates to overload the system, and up to ten times the amount of phosphate needed to foul the pond.
Bottom line, don't feed or encourage waterfowl to call the pond home.
5 REASONS WHY FEEDING WATERFOWL IS HARMFUL
People have always enjoyed feeding geese, ducks or swans at beaches and parks. What they might not realize is that feeding these animals is detrimental to the birds and the environment in many significant ways. As a result please read on to learn more about the harmful effects of hand feeding waterfowl.
Birds have amazing survival skills
Waterfowl have an incredible ability to survive and avoid harsh weather conditions. They migrate hundreds of miles south to a warmer climate for the winter where food is abundant, or simply endure the harsh winter weather in northern areas. Many species of migratory and resident waterfowl spend the winter in here. For all waterfowl, the abundance of naturally occurring food and the quality of their diet are the main driving forces behind the birds ability to survive.
Food quality is critical
Waterfowl require proper nutrition to survive New England winters. The diet of a young bird during its first year of life must be high in essential fats, proteins and nutrients to ensure proper development. Adults need a nutrient rich diet in order to replace feathers, and recondition their bodies after migration and during breeding cycles. People unknowingly harm waterfowl by hand feeding food that is low in nutritional value.
High nutrition foods include:
Submerged Aquatic Plants
Low nutrition foods include:
Problems associated with feeding waterfowl include:
◊ Malnutrition ◊ Dependency ◊ Disease ◊ Water pollution ◊ Environmental degradation
Each problem is described below in detail.
Through evolution wildlife species have developed skills to obtain food that contains the essential nutrients needed to survive, reproduce and live a healthy life. These skills help maintain a balance between animals and their natural habitat. This balance is compromised by hand feeding, which is physically harmful to birds and is one of the primary causes of malnutrition. Malnutrition is caused by the types of food that people hand feed to the birds. Foods such as bread and crackers don't provide the necessary energy and nutrients for proper health, and energy is wasted in digesting these foods. Birds become dependent upon humans because more poor quality foods are needed to make up the difference.
Malnutrition leads to:
◊ Low energy and muscle deterioration.
◊ Development of deformed wings in young birds.
◊ Loss of flight later in life.
◊ Lowered ability to avoid predation.
◊ Decrease in successful reproduction.
◊ Lowered life expectancy.
Waterfowl, particularly Canada geese and mallards, will congregate in areas with abundant food and space. Unfortunately, hand feeding can cause birds to become concentrated in smaller areas that are incapable of supporting large numbers of birds. The birds then become dependent upon humans for food and can become nuisance animals. Some species, particularly mute swans, can become aggressive and may need to be removed.
Dependence upon humans for food causes:
◊ Loss of their natural fear of humans, which creates aggressive behavior.
◊ Overpopulation of small wetlands and ponds.
◊ Delay or halting of migration to natural wintering sites.
Lowered nutrition and overpopulation allow disease to spread more quickly, potentially infecting thousands of birds with fatal diseases such as Avian Cholera, Duck Plague, Avian Influenza and Avian Botulism. Although these diseases have always existed in waterfowl populations, the risks increase when bird populations become concentrated at feeding sites.
4. Environmental degradation
Waterfowl naturally congregate in wetlands, when and where natural foods are plentiful. However, when hand feeding occurs, the over-concentration of birds may ultimately cause overgrazing and degradation to the landscape.
High concentrations of birds cause:
◊ Overgrazing of vegetation leading to soil erosion.
◊ Degradation of the landscape making it undesirable for other species and unsightly for humans.
◊ Unsanitary conditions due to large quantities of bird feces.
5. Water pollution
People will often feed ducks or swans at the local pond. This not only causes a nuisance situation with birds begging for and stealing food, but also contributes significantly to water pollution in the form of fecal coliform bacteria. High levels of fecal coliform bacteria in the water cause human health problems. This pollution directly affects the enjoyment of our local waters.
When people feed waterfowl
◊ Waterfowl can become concentrated in small urban environments that are not capable of supporting large flocks.
◊ Waterfowl may become malnourished and risks of disease increase.
◊ Birds can become nuisance animals at feeding sites and other areas where they congregate.
◊ Unnatural concentrations of waterfowl can cause overgrazing and erosion, which may be undesirable for other species.
◊ High concentrations of fecal coliform bacteria contribute to unsanitary conditions and to closures of beaches.