The photo of the caterpillar is a bit blurry, so it's hard to be sure which critter is chewing on your maple tree. There are a few possibilities:


Spongy Moth Larva (formerly called Gypsy Moth). Below is information:

https://www.canr.msu.edu/resources/dealing-with-spongy-moth-around-your-home-or-property

Forest Tent Caterpillar. Their name is somewhat misleading because they do not create tents. Their preferred host is sugar maple, but likely any maple will do. They begin hatching around early May and often are seen crawling up the sides of buildings. Please see link below:

https://extension.umn.edu/yard-and-garden-insects/forest-tent-caterpillars

Suggestions for control of FTC:

• Removing egg masses from trees (especially during winter when they’re easier to find).
• Sweeping larvae and pupae from walls and trees with a stiff broom or pressure washer.
• Adhesive bands on tree trunks to capture larvae crawling up or down trees.
• Microbial insecticides including Bacillus thuringiensis, spinosad, and baculovirus, all of which can be applied with minimal effect on nontarget insects.