  We study the nontrivial effects of the NUT charges on the shadows of the
Kerr-Taub-NUT black holes seen by zero-angular-momentum-observers. Inclination
angles with which the observers gain maximal, locally extreme or minimal shadow
sizes and distortions are investigated for the black holes with different NUT
charges and distributions of string singularities. Typically, we discover that
when the observer approaches the string singularity, the shadow size can be
relatively very small while the shadow distortion being relatively quite large.
And exceptionally, we find that when the string singularity locates only at the
south pole axis of the black hole with large enough NUT charge, the shadow size
is maximal for a north pole observer.
