Because it was already daytime, they could clearly observe the whole process of the ant queen's emergence and its biological power of moving freely through the soil.
On both sides of the ant queen's body was a tymbal like the one on male cicadas.
(TL: Secrets of the cicada's sound: https://www.sciencedaily.com/releases/2013/05/130530152846.htm )
This device could produce strong ripples through ultra-high frequency vibrations. The ripples were synchronized with the resonant frequency of the earth around the ant queen, so the ant queen could easily crush the earth around it into sand. Coupled with the queen's superior strength, of course it could travel freely under the ground.
