Why Your Bird Feeder Might Be Bringing More Than Just Birds

Putting out a bird feeder may seem to be an easy way to watch wildlife, but this activity actually does not involve merely the tray and the perch of this feeder, with most of what is important occurring at the bottom, where the seed falls off.

As seeds drop down, they accumulate, resulting in a new feeding place that attracts various species apart from birds. Based on West Virginia University Extension information, seed falling from a bird feeder will accumulate rather than vanish, thus attracting rodents, deer, squirrels, and even bears. In addition to attracting other animals, leftover seed promotes the development of fungi and bacteria in accordance with the information given by West Virginia University Extension.

In a similar manner, Colorado State University Extension reports that seed may spread further away from the feeder because birdseed tends to cover a greater territory than one may expect; this occurs because of a lack of seed catchers attached to the bird feeder.

More animals begin to visit

After the food becomes predictable, the animals start coming back, and then things get complicated. It is referred to as the "food subsidy" phenomenon when there is a constant food source, which influences the behavior of animals in terms of how they use their environment. According to the Extension advice, mammals like mice and deer are attracted by the spilled seeds, and the animals follow the predictable pattern while traveling to the site.

The Center for Disease Control and Prevention public health guidelines indicate that bird feeders have to be cleaned up on a regular basis, and the food should not be left outside for the animals. According to the CDC, the lack of control of food sources may turn the quiet backyard into an area full of wildlife where different species interact at one point.

What does this have to do with ticks?

A bird feeder alone has not been shown to cause an increase in tick population, and that is a crucial point. According to a study done in Dutchess County, New York, on homes with and without feeders, there was no substantial increase in tick numbers or Lyme disease presence among houses with bird feeders, as described on PubMed. Nevertheless, scientists state that this does not mean that there will be no ecological effect produced by the feeder's attraction of creatures.

According to the CDC website, ticks are often seen in areas where the grass and forest meet and use the animals that move around the house for transportation. In this case, a bird feeder would only help in increasing the number of animals that might bring ticks onto the property.

Birds also play a role

It is important to mention that the interaction between humans and ticks may occur through the use of birds as well, although this aspect is not considered very often. The review published by PubMed in North America found that out of 162 bird species studied, 78 of them had ticks. In an area endemic for Lyme disease, 69 percent of birds caught were found to carry immature ticks, including American robins.

The scientists note that the use of birds as a means to move ticks long distances and deposit them into residential locations that are commonly visited by people occurs due to birds’ presence in certain areas. This aspect may occur in yards where there are feeders.

Why rodents and birds together matter

The interaction between birds and rodents complicates the whole picture even further. According to the results of a field experiment conducted in southeastern Canada, both birds and mammals participate in the spread of Borrelia burgdorferi, the agent responsible for Lyme disease. Scientists estimate that the number of infected ticks was largely due to mice, but a considerable percentage resulted from birds as well.

Such a situation implies that when seeds spilling from birdfeeders attract rodents, this might create a link between the mammals’ part of the disease spread chain and the avian one.

Managing the feeder area

The experts recommend neither getting rid of the bird feeders completely nor using them carelessly without considering the way they should be used. West Virginia University Extension advises paying special attention to avoiding the accumulation of seeds, while the Center for Disease Control and Prevention recommends cleaning them from leftovers.

If a feeder is properly maintained, it will minimize spills and, thus, attract fewer unwanted visitors, but if it remains forgotten, it might silently shift the habits of the local fauna. The main idea expressed by both sources is that it is enough to leave even some seeds scattered around to affect animals' behavior.

The bigger picture

The tale of bird feeders goes beyond just being a story of birds; it is a story of how little human behavior can influence local ecology. According to studies, bird feeders in themselves cannot attract ticks; however, they have the potential to set up circumstances where birds, mammals, and ticks may come into close proximity within a small area. Over time, this process may lead to increased interactions between humans and their pets with wildlife in their own backyards.

Put simply, it is important to remember that what comes out of bird feeders is as important as what remains within them.