What is one common sign of a termite infestation in a property?

Swarming in the spring is a significant indicator of a termite infestation because it typically signals that a colony has reached maturity and is reproducing. During the spring, reproductive termites, also known as alates or swarmers, leave their nests to mate and establish new colonies. Observing a swarm of these termites, especially near or inside a property, is a clear sign that there is an active colony nearby.

Recognizing this behavior is crucial for homeowners and pest control professionals as it prompts further inspection and treatment. The presence of swarming termites can often be the first visual sign that a termite issue exists, highlighting the urgency for action to prevent damage to the property.

The other options, while they can indicate various problems in a building, do not serve as direct signs of a termite infestation. For instance, cracks in the foundation could be a result of settling or other structural issues, visible mold growth typically relates to moisture problems rather than pest infestations, and changes in paint color may indicate water damage or age but do not specifically link to termites.