Answered for Danville, Hendricks County (county seat) County.
Every spring on the wild cherry that seeds itself into Indiana fence lines. In Danville, the Main Street Historic District developed circa 1844–1920 across just 9 acres and 37 contributing buildings, and the Courthouse Square district circa 1865–1960 over 70 acres — those blocks hold the town's oldest and largest trees on narrow lots with sidewalks on both sides. Danville does actively manage its right-of-way canopy through a standing Tree Advisory Committee, though the specific inventory and replanting-ratio requirements attributed to Chapter 97 could not be verified. Cosmetic on an established tree.
Danville's canopy and what's at risk
The Main Street Historic District developed circa 1844–1920 across just 9 acres and 37 contributing buildings, and the Courthouse Square district circa 1865–1960 over 70 acres — those blocks hold the town's oldest and largest trees on narrow lots with sidewalks on both sides. Danville does actively manage its right-of-way canopy through a standing Tree Advisory Committee, though the specific inventory and replanting-ratio requirements attributed to Chapter 97 could not be verified.
What to look for
Silk tents in branch forks in spring, with caterpillars massed inside.
Whether the tree can be saved
Cosmetic on an established tree. The tents look far worse than the damage is, and the tree refoliates.
Timing in Hendricks County (county seat) County
Remove tents by hand in early morning while the caterpillars are inside. Do not burn them out — people set trees alight doing this every year.
“These guys saved our bacon! Our job was complicated to put it mildly, and an emergency. We had a tree stump growing around an actively leaking water…”
“A great family business. Steven and son Steve did a fantastic job removing a large dead tree that was in a tight spot between our back fence and kids…”