The cost to hire an exterminator or pest control service is $175 on average, with typical costs ranging from $100 to $500. However, you could spend more depending on several factors, including the type of pest, the size and severity of the infestation, and the number of visits required.

Service costs also vary by frequency:

• One-time service: $300–$550

• Initial visit with ongoing service: $150–$300

• Monthly visits: $40–$70

• Quarterly visits: $100–$300

• Annual visits: $300–$550

The type of pest significantly impacts the price. For example, exterminating spiders typically costs between $100 and $300, while a termite problem can range from $230 to $2,500 or more, depending on the extent of the damage. Routine pest control services can help prevent future infestations and costly damage to your home.

Using audio and visual methods to discourage birds might work initially, but birds tend to acclimate to them over time. While chemical deterrents can show some effectiveness, their results can be inconsistent. Some may dissipate too quickly, and there's a risk they might cause unintended damage to your surroundings. Additionally, birds might become immune or resistant to the impact of such treatments.

Both spikes and loose nets can be installed over nest sites to prevent the bird from returning, but nets are not a humane option since birds and other wildlife can get tangled in them. 

Spikes are a humane alternative that deter nesting without harming the birds. In small areas, like vents, a very fine mesh net can be installed to prevent the bird from returning. These nets don't generally pose a risk to the birds.

There are DIY methods and store-bought pesticides available for the public to use. However, these pesticides also come with a risk, and you need to follow the directions correctly and take precautionary measures to prevent exposure to these chemicals. These methods may be an option for small pest problems, but you should call in a pest control specialist for persistent pests and infestations.