Researchers from the University of Cincinnati are utilizing advanced mapping techniques to identify and preserve essential habitats for North America’s largest woodpecker, the pileated woodpecker, in suburban regions.
Ruijia Hu, a doctoral student at the university, explains that wildlife habitats in densely populated areas like southwest Ohio are increasingly becoming fragmented as forests are replaced by new construction. This poses a threat to animals like the pileated woodpecker that rely on specific habitat conditions for their survival.
Pileated woodpeckers, characterized by their colorful red crests and striking white facial stripes, are found across forests from British Columbia to Florida. Nicknamed carpenter birds, these crow-sized birds are known for their natural woodworking habits. “I think they’re beautiful birds. They were the model for the cartoon character Woody Woodpecker,” said Hu.
These birds prefer mature woodlands with dead timber, which provides a home for grubs and other preferred food sources. While pileated woodpeckers are currently considered a species of low conservation concern, their particular habitat needs render them vulnerable to human development.
Pileated woodpeckers create cavities in trees for their nests annually, generating valuable living spaces for other animals like fox squirrels and screech owls. “They make new nests every year. They won’t reuse old ones. Other animals depend on them,” said Hu.
Studying the elusive pileated woodpecker can be challenging, so Hu turned to citizen science for assistance. She used eight years of sightings data collected by birders and logged into the website eBird to determine where the birds have been observed in Hamilton County, Ohio.
By overlaying this data with remote sensing information, Hu discovered that corridors along rivers and creeks with abundant mature trees and deadwood help the birds adapt to their increasingly fragmented urban environment. One such prime location for pileated woodpeckers in Hamilton County is found along the Little Miami River.
The researchers subsequently developed a model to identify the most critical habitat corridors. This information can assist park managers and government planners in making better decisions about preserving or restoring valuable contiguous forest patches. Hu presented her findings at the American Association of Geographers’ conference in Denver.
Susanna Tong, study co-author and UC Professor, highlights the growing importance of wildlife corridors in conserving species within urban spaces. “With fragmented forests, many habitats that were once suitable for wildlife are broken up. Wildlife is unable to find habitat big enough to meet their survival needs. And even if there are suitable habitats, the distance between them can be too great,” said Professor Tong.
“Wildlife corridors link up these habitat patches. Since wildlife can travel and migrate from one patch to another, the probability of finding food and shelter is higher and they can still survive in the fragmented landscape.”
Although the pileated woodpecker population is currently stable, it has experienced significant decline in the past.
“This bird’s population saw a huge decline in the late 18th and 19th centuries when a lot of forest was converted to agriculture. But when reforestation started, it recovered,” explained Hu.
The United States has witnessed the rapid extinction of similar species, such as the ivory-billed woodpecker, due to sudden habitat loss.
Hu stresses the need for greater attention to urban species, even those not considered vulnerable. As development continues to consume forests in congested regions, the tipping point for these species could arrive swiftly and unexpectedly.
“You can’t fix it overnight. It’s not just about planting more trees. The birds need mature forest, so it could take 30 to 50 years to replace their habitat. At least we can protect these riparian forest corridors and see that existing trees reach maturity,” said Hu.
Woodpeckers provide several ecological benefits that contribute to the health and balance of forest ecosystems. Some of these benefits include:
By fulfilling these important ecological roles, woodpeckers contribute to the health, resilience, and diversity of forest ecosystems, benefiting both the environment and human populations that rely on these resources.
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