Brood XXII

13-year cycle · last emerged 2014

States: KY, LA, MS, OH

Baton Rouge Brood; centered on southeast Louisiana and southwest Mississippi.

Source: USDA Forest Service / UConn. Adults emerge when soil 20 cm down reaches ~18°C (64°F), usually mid-to-late spring.

Next broods to emerge

Emergence years are well-established; the exact week varies with spring soil temperature. How this works.