Why do animals sometimes stop signaling to group members when they freeze?

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A fluffy gray cat clings to the trunk of a tree, looking upward as it climbs to escape. — Avoidance behaviour Cat fleeing by upward climbing.

Animals stop signaling to group members when they freeze because there is an evolutionary conflict between the need for communication and the necessity of camouflage.

While social groups often maintain contact through vocalizations or movements—such as tail flicks or displaying patches of white or colored fur—these signals are inherently conspicuous and can increase the risk of detection by predators. When an animal enters a state of freezing, it employs motor inhibition to remain undetected. Consequently, signaling behaviors are inhibited to prevent the animal from betraying its position, as the primary function of freezing is to make detection less likely.1