TPWD News Release — May 28, 2014
“Feeders mainly benefit people; they bring birds in and make it easier to see them. So when we feed birds, we have a responsibility to make sure that what we provide is healthy,” said Cliff Shackelford, a Texas Parks and Wildlife Department ornithologist based in Nacogdoches. “Native plant landscaping, such as with the Texas Wildscapes program, is like a feeder that cleans itself, consistently providing good, fresh food.”
Various diseases can develop in birds that congregate around feeders, including salmonella, avian pox, Aspergillus fungus, and parasitic protozoans.
Bird seed can go bad after it’s been purchased, while it’s stored. Harmful fungi grow most rapidly in humid environments. People should therefore be cautious about using seed that they’ve stored for weeks or months, especially in a warm, humid area.
Also, research by the Caesar Kleberg Wildlife Research Institute at Texas A&M University-Kingsville in 2003 shows that bird seed purchased for feeders can contain aﬂatoxin, a fungus by-product that can cause diseases and harm the immune system, making birds more vulnerable to normally non-fatal illnesses. Corn and peanuts are more likely affected than other foods commonly provided at feeders.
This year, Shackelford said, there’s been a concerning increase in the number of people calling TPWD reporting dead birds, including blue jays, cardinals and doves. However, he said there are common-sense steps people can take to reduce risks to birds, including:
For more information about how to protect birds from aflatoxin and other dangers, see the aflatoxin in bird seed web page of the Wild Bird Feeding Industry, a trade association for the wild bird and backyard wildlife feeding industry.