• National oak monitoring: testing traps and sampling strategies 

      Burner, Ryan C.; Sverdrup-Thygeson, Anne; Birkemoe, Tone (MINA fagrapport;70, Report, 2021)
      The National Program for Hollow Oak Monitoring (Nasjonal overvåking av hule eiker) has identified and monitored more than 650 hollow oaks (Quercus sp.) across Norway. These rare but long‐lived trees provide important habitat ...