Final answer:
To prevent birds from roosting on buildings, PCOs may utilize ultrasonic devices, chemical repellents, habitat modification, exclusion techniques, and trapping.
Step-by-step explanation:
The techniques a Pest Control Operator (PCO) can use to keep birds from roosting in or on buildings are:
- Ultrasonic devices: Emit sounds to deter birds which are sensitive to certain frequency ranges.
- Chemical repellents: Use non-lethal substances to make an area less attractive to birds.
- Habitat modification: Alter the environment to make it less appealing or hospitable for birds to roost.
- Exclusion techniques: Implement physical barriers like netting to prevent birds from accessing certain areas.
- Trapping: Capture birds to relocate them safely to a new location.
These control measures represent a combination of mechanical, chemical, and biological controls, all of which aim to manage pest populations in an environmentally responsible way.