  In this paper, we investigate the microlensing effects of wormholes
associated to black hole spacetimes. Specifically, we work on three typical
wormholes (WH): Schwarzschild WH, Kerr WH, and RN WH, as well as their
blackhole correspondences. We evaluate the deflection angle upon the second
order under weak field approximation using Gauss-Bonnet theorem. Then, we study
their magnification with numerics.We find that a Kerr WH could lead to multi
peaks in the magnification with certain parameters in the prograde case, while
a Kerr BH predicts one peak. Therefore, the multi-peak feature of can be used
to distinguish the Kerr WH from other compact objects. We also find that the
magnification of RN BH will be one peak compared to RN WH, in which the
magnification of RN WH is negative in some situations. For other cases, the
behavior of magnification from wormholes and their corresponding blackholes is
similar. Our result may shed new light on exploring compact objects through the
microlensing effect.
