Bill length. All measurements are in mm.

Location Year Sex N Mean SD min-max Source
               
Eisenberg-Pfalz / Germany 2014–2017 M 49 33.3 3.1 26.9–41.0 Bastian and Bastian, unpublished
F 37 32.9 2.9 27.7–39.6
               
Sachsen-Anhalt / Germany 2016 M 59 33.1   30.0–35.0 16
F 54 31.7   29.0–35.0
               
Hungary 1985–1990 M 33 33.9 0.9   20
F 27 33.1 1.2  
               
Transylvania / Romania 1965–1966 M 20 33   28–44 18
F 18 32   28–37
               
Sicily / Italy (20 April) 1997–2001 M 36 45.3 3.9   21
F 10 43.0 3.4  
               
Sicily / Italy (20 May) 1997–2001 M 39 30.5 2.6   21
F 12 28.8 1.8  
               
Sicily / Italy (20 June) 1997–2001 M 18 41.5 2.1   21
F 23 40.0 1.7  
               
Portugal 2016 M 34 31.7     16
F 23 30.6    
               
Almería, Jaén / Spain 2000 M/F 39 40.1 2.7 33.7–44.5 22