If American crows frequent your backyard, chances are you have witnessed them dipping food into a birdbath. Whenever we witness such behavior, we cannot help but wonder why a bird would go to the trouble of soaking a piece of food in water before gulping it down.
The truth of the matter is we are not absolutely sure fully understand the reason behind this behavior or why they do not do it all of the time. The most widely held theory is it is done to soften their food. This theory explains why they might dunk a hard, dry chunk of dog food or stale bread in water. However, for the life of me, I cannot see how this explanation explains why American crows also place dead animals such as birds and mice, animal bones, snails and even bits and pieces of roadkill in birdbaths.
Others suggest nesting crows dip bakery products and pet food in water prior to subsequently feeding them to their nestlings for a couple of reasons. First of all, it makes the food more palatable for their young. It is also is an easy way for adult birds to provide their youngsters with water.
Regardless, it is always a good idea to clean a birdbath that has been used as a “dipping” station by crows. Invariably, whenever crows are dipping their food in our birdbaths, it is very likely they are leaving behind bacteria and fungi that were clinging to the food. These microorganisms could be harmful to the birds that will later use the water to bathe and drink.
Although the periods of warm weather we have experienced this winter have reduced our home heating bills and provided the opportunity for us to spend more time outside, it has increased the chances that the birds visiting our feeders can contract a life-threatening disease. As such, reports of sick and dying birds are beginning to crop up.
The two main culprits in these die-offs are typically salmonella and aspergillosis. These diseases are extremely deadly and can decimate the birds feeding in our backyards unless steps are taken to stem their spread.
Aspergillosis is caused by a fungus. Aspergillosis spores are produced by a green mold found naturally throughout the state. Quail, turkeys, cardinals, sparrows, finches and other birds are highly susceptible to the disease. The organism kills by infecting its victim’s throat and lungs. Animals contract the disease by eating food infected with the spores.
Salmonella is bacterial disease that attacks birds, mammals as well as reptiles and amphibians. Salmonella bacteria are spread by animals eating food that has been contaminate by the droppings of animals infected with the disease.
Since both diseases flourish during any season of the year, as long as the weather is warm and wet, our abnormally warm winter will continue to promote conditions that encourage the harmful bacteria and mold to thrive on bird feeders and the waste seed and hulls found on the ground beneath them.
Fortunately, you can greatly reduce the chances of birds contracting the diseases by taking a few simple steps.
Periodically clean feeders and birdbaths with a cleaning solution composed of two ounces of bleach mixed with a gallon of water. Thoroughly scrub each feeder and birdbath and then rinse with clean water. Allow feeders to dry in the sun before refilling them with seed.
Over time, both seeds and seed hulls build up beneath feeders. Consequently, during periods of wet, warm weather you should rake up the seeds and hulls and dispose of them in the trash. Periodically changing the locations of your feeders also helps thwart the spread of the diseases. After cleaning the area, I also treat the ground with a solution of bleach and water.
Researches have discovered sunflower hulls contain a play growth inhibitor. By removing the hulls, you are ensuring that the grass or ornamental plants growing beneath the feeders will not be affected by the growth inhibitors.
Keep all seed dry. Avoid using feeding trays with solid floors. If you scatter seed on the ground, during warm, damp weather only put out enough food to feed the birds for a single day. Hopper-type feeders, feeding trays covered by roofs or feeding trays with screen bottoms help prevent the development of mold and bacteria.
Your quick action can save the lives of countless birds and guarantee you will be able to watch a parade of birds throughout the entire year.
If you feed birds in your backyard, eventually you will either see or find evidence that one or more of the birds drawn to your backyard bird cafe fell victim to a hawk. Thanks to the data collected by thousands of volunteers that have participated in Project FeederWatch since 1987, ornithologists are now able to provide us with a better understanding of this activity.
The ongoing Project FeederWatch study is sponsored by the Cornell Laboratory of Ornithology, Bird Studies Canada, National Audubon Society and the Canadian Nature Federation.
You might find it surprising to learn the leading cause of death in and around bird feeders is actually window strikes. In fact, birds being killed when they fly into windows is estimated to less than one percent of the birds that fly south in the fall. Roughly, half of all deaths documented by Project FeederWatch volunteers were attributed to window strikes.
In comparison, cats were responsible for 30 percent of the reported mortality. Hawks were involved in roughly a third of the bird deaths tallied. Sharp-shinned and Cooper’s hawks were linked if some 50 percent of these cases.
Although sharp-shinned and Cooper’s hawks are similar in appearance, they have different feeding preferences. The diet of the sharp-shinned hawk consists primarily (95%) of small birds. During the study, sharp-shinned hawks were reported to feed on 28 species of birds. The six birds most commonly caught were European starlings, house sparrows, house finches, dark-eyed juncos, pine siskins and mourning doves. It is interesting to note, three of these birds (the European starling, house finch and house sparrow) are not native to Georgia.
For some reason, during the reporting period, sharp-shinned hawks were most often seen hunting in suburban yards than those located in urban or rural areas.
On the other hand, birds comprise only about fifty percent of the diet of the Cooper’s hawk. Out of the 22 birds captured at feeders by this hawk, by far, its favorite food was the mourning dove. Other birds preferred by the Cooper’s hawk were house sparrows, European starlings and dark-eyed juncos.
The study emphasized hawk predation was not a common occurrence.
In fact, an analysis of the data collected found each winter during the study period neither of the hawks was ever seen in most of backyards.
There seems to be little information available on which wild birds will eat dry dog food. However, I suspect the list of birds that dine on dry dog food is longer than we may realize. The problem is few people have experimented offering this food to their feathered neighbors.
I have rarely intentionally fed dog food to birds. However, on a number of occasions I have seen American crows and common grackles toting off chunks of dog food left behind by our family dogs. In some cases, the birds carried the food to a nearby birdbath where they thoroughly doused the chunks of food in water before trying to eat them.
Others have reported house sparrows, dark-eyed juncos, common ground doves, eastern bluebirds, blue jays, and European starlings will eat dry dog food.
I honestly believe if dry dog food were offered more often in feeders, the list of birds known to eat this unusual food offering would be considerably longer.
When you think about it, there is no reason why dry dog food should not be popular with wild birds. Major brands of dog food contain protein, carbohydrates, vitamins, and minerals. In fact, some dog foods are probably more nutritionally balanced than some of the food they typically consume.
Why don’t you join me in this mini experiment? Perhaps we will learn something about the merits of feeding dry dog food to birds.