Regulations and Government
For Pilots, Wasps' Nests Can Be Riskier Than Their Sting
Pitot and static tubes blocked by wasp nests can cause a total loss of function of airspeed or altitude indication and control functions.

Aircraft operators need to be aware that wasp nests that go undetected and are not cleared from pitot tubes, fuel vents and drains can result in failure of critical systems, as well as faulty instrument readings. The Civil Aviation Safety Authority (CASA) of Austria is concerned enough about the hazard that it has issued an airworthiness bulletin to “urgently advise operators, maintainers and pilots of the dangers associated with undetected wasp infestation in aircraft.”