Woodpecker Damage on an Emerald Ash Borer Infested Tree

This short video shows the flecking damage caused by woodpeckers searching for overwintering emerald ash borers in an infected ash tree. This phenomena highlights the damage caused by invasive species. Each ash tree at this location shows this damage.

• What would cause chunks of bark to be ripped off a tree?

• What’s on the snow? 
• Can you identify the tree by the bark?
• What would the woodpeckers be looking for? 
• What would be the prognosis for this tree, being infested with the emerald ash borer?
• Over time, what will happen to forest stands where ash trees are a major component? 
• Are there any previous events where a pest caused a major change in forest tree composition? 

Students could:

• Investigate other troublesome invasive species (and non-troublesome exotics). 
• Identify tree or plant pathogens and pests to understand that illnesses aren’t confined to only humans or animals.

• Iowa Department of Natural Resources (DNR) | Emerald Ash Borer: The DNR’s resource page features lots of information about the emerald ash borer, including damage, treatment, firewood and more. 
• Purdue University Extension | Invasive Species Investigator: A series of lessons on invasive species. These could be easily adapted to fit your specific location, species, or student age. 
• Don’t Move Firewood | Iowa: Extensive resource page with information on the connection between firewood and the spread of invasive forest pests. 
• University of Wisconsin | Symptoms and Signs of EAB Damage: University of Wisconsin website with pictures and descriptions of what to look for to see emerald ash borer damage on a tree.