I found a quote from the impact of wild deer at potato creek state park study....
" deer population has increased considerably over the last decade in Potato Creek State Park, from 77 total deer in the park (5 per sq km) in 1981 (R. Grimes, pers. comm.) to counts of 95.7, 79.5, 96.9, and 83.6 per sq. km (248, 206, 251, and 214 per square mile) in 1991, '92, '93, and '94, respectively."
Read that closely....
There were 5 deer per square kilometer in 1981. That equals 12.95 deer per square mile.
Just 10 years later, here's the deer counts for 4 years.
248 deer per square mile in 1991
206 deer per square mile in 1992
251 deer per square mile in 1993
214 deer per square mile in 1994
While lots of people enjoyed driving out there and watching the huge deer herds, if you looked closely, they were starving. There was nothing for them to eat. It was all gone up to 6' high.
They've implemented a quite aggressive deer management program in the state parks here since then. And now the deer are down to normal levels per square mile. The forests and plant life are coming back very well. Nice and thick.
It's not natural to be able to see through a forest in this part of the country.
Here's a link:
IMPACT OF WHITE-TAILED DEER ON PLANT COVER AND BIOMASS
IN POTATO CREEK STATE PARK, ST. JOSEPH COUNTY, INDIANA
1995
Interesting read.
https://journals.iupui.edu/index.php/ias/article/download/7378/7369/0