Active bear dens with cubs will often produce sounds like squeaking, grunting, humming or sucking, usually when cubs are nursing.

Source: https://chicago.suntimes.com/2023/2/25/23612138/doe-sandhill-cranes-bison-illinois-deer-harvest-bear-dens-outdoor-notes

Ah yes, I’ll think, as I hear scavengers scuttling towards my body across the trashscape, grunting and hooting for meat: that was the moment.

Source: https://www.spectator.com.au/2023/07/youtube-and-the-final-state-of-total-kippleization/

The guy sitting next to me actually me to move so he could get off instead of just grunting and staring into my soul, as people usually do.

Source: https://www.theage.com.au/national/optus-died-for-a-day-but-i-felt-never-felt-more-alive-20231110-p5ej7i.html?ref=rss&utm_medium=rss&utm_source=rss_feed

The new accusations comprise unwanted touching, including “a hand in underwear, on the crotch, on the buttocks or on the breasts”; “obscene sexual remarks”; and “insistent grunting.”

Source: https://www.breitbart.com/entertainment/2023/04/14/report-french-star-gerard-depardieu-accused-of-sexual-violence-by-13-women/

“There was a body pressing against me and there was a very strange grunting noise,” she testified of the moment of the collision.

Source: https://globalnews.ca/news/9580898/gwyneth-paltrow-ski-crash-trial-terry-sanderson-stand-optometrist-video/