The ornamental design for a pillarinsecttrap with bird guards, as shown and described.
FIG. 1 is an upper-front-right perspective view of a pillar insect trap with bird guards, according to our new design;
FIG. 2 is a front view of the pillar insect trap with bird guards shown in FIG. 1, which is the same as the rear view;
FIG. 3 is a top plan view of the pillar insect trap with bird guards shown in FIG. 1, which is the same as the bottom plan view;
FIG. 4 is a left side view of the pillar insect trap with bird guards shown in FIG. 1, which is the same as the right side view; and,
FIG. 5 is a perspective sectional view of the pillar insect trap with bird guards through section 5-5 indicated in FIG. 2.
The broken line showing of top and bottom hanging features is for the purpose of illustrating portions of the pillar and forms no part in the claimed design.