Source sample selection. All pulsars with a DM lower than 50 pc cm⁻³ are shown. The star symbols represent pulsars with a published flux density at 150 MHz. The dot markers represent the pulsars for which no published flux density at 150 MHz exists; in these cases, the flux densities were extrapolated from higher frequencies, using a conservative spectral index of −1.4, unless a spectral-index measurement was previously published. The green symbols represent pulsars for which we detected scintillation in our LOFAR data, while red symbols represent pulsars for which scintillation was not detectable. Orange symbols indicate sources for which the scintillation was detected but not resolved (see text). Sources for which scintillation arcs were published in literature are encircled with a gray circle, while scintillation arcs presented in this work are represented by green circles.