Number of drills per attack across sampled tree species. Sirex noctilio attacks (oviposition sites) with 1, 2, 3 or 4+ drill holes for Pinus sylvestris and P. resinosa.

 
 
  Part of: Krivak-Tetley FE, Sullivan-Stack J, Garnas JR, Zylstra KE, Höger L-O, Lombardero MJ, Liebhold AM, Ayres MP (2022) Demography of an invading forest insect reunited with hosts and parasitoids from its native range. NeoBiota 72: 81-107. https://doi.org/10.3897/neobiota.72.75392