Fig. 2
From: Are long-term biomonitoring efforts overlooking crayfish in European rivers?
Distribution of time series containing records of native crayfish a Astacus astacus, b Pontastacus leptodactylus, c Austropotamobius torrentium, and d Austropotamobius pallipes indicating the year the respective species was first recorded. Data were obtained from Haase et al. [43]. For the distribution of the different crayfish species please see Kouba et al. [59]. Crayfish drawings are the possession of the FFPW USB and drawn by the MgA. Radka Bošková