  Active nematics, in their pure form, have demonstrated a plethora of dynamic
and steady state behaviors, including large-scale dynamic structures,
collective flows, and intricate multi-spatial temporal dynamics. This
complexity further increases in the presence of external polar agents. We
investigate active nematics interspersed with polar microswimmers, akin to
active apolar cells infused with active impurities, microswimmers. Our
comprehensive numerical study reveals that varying the microswimmers' motility
induces a novel spatiotemporal state in the active nematics backdrop. This
state is marked by macroscopic swirl-like structures and a reduction in the
overall order of the active nematics. Interestingly, this state emerges at
intermediate motility levels, where microswimmers form local clusters and
exhibit coherent motion. However, at higher motility levels, the swirls become
less coherent, and microswimmer clustering intensifies. We show that the effect
of the polar microswimmers on active nematics can be interpreted as a
spatiotemporally correlated colored noise on active nematics, which promotes
bend instability in active nematics, leading to the observed swirling dynamics.
Our findings indicate that the spatiotemporal states are highly sensitive to
the microswimmers' motility, offering potential avenues for pathogen
identification based on known motility characteristics
