I just saw my first catalpa worm of the year. Catalpa sphinx caterpillars (Ceratomia catalpae), are capable of defoliating a large catalpa in a relatively short period of time. This often happens in the heat of the summer between mid-June and the 4th of July.
Anglers across the South prize these caterpillars as the absolute best fish bait available during high summer. If you have a Catalpa, don’t worry about these caterpillars – maybe plan a fishing trip.
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If you have time. Check out this article.
https://www.finegardening.com/article/catalpa-trees-catawba-worms-and-southern-lore