Ticks.

This is coolbert:

Unlikely source = local spies per the criteria of Sun Tzu.

 "Israeli Forces Are Reportedly Getting Crucial Intelligence From an Unlikely Source"

From Townhall ^ | 11/13/2023 | article by Matt Vespa that tip from Freeper.

"Israeli forces have cut the Gaza Strip in two, surrounded Gaza City, and are tightening the noose around the reported nerve center of Hamas. Before the ground invasion began on October 28, Israel pounded the strip with artillery and air strikes, killing scores of terrorists and their leaders. Many have hidden in the matrix of tunnels, which has been an operational concern for the IDF. They’re booby-trapped. It’s nearly impossible to see, and some tunnels are 250+ feet underground. So far, Israel has been able to make inroads, but some 30-40,000 Hamas terrorists remain embedded in the strip like ticks...."

The great master Sun Tzu having identified five "classes" of spies:

"(1) Local spies; (2) inward spies; (3) converted spies; (4) doomed spies; (5) surviving spies."

Local spies = "Having local spies means employing the services of the inhabitants of a district."

Palestinian Arabs, residents of Gaza, willing for a variety of reasons to spy and provide intelligence for the Israeli. Identification of Hamas tunnel entrances/exits, strong-points, fighting positions. Etc.

coolbert.