Los Angeles County, Los Angeles Rat Control Situation:
Hi David, I'm in southern California. I have at least one rat in my ceiling, maybe two or more. I've read your website and really appreciate the great insight you're providing. Based on your advice, I've caught 3 rats around the outside my house (over the last 2 months), trimmed trees back (3 days ago), and plugged all the access holes I could identify (3 weeks ago).
Yet I still have at least one rat in my attic. Though I've place several snap traps (baited with peanut butter and bird seed) in the attic, I get no nibbles. I also cannot find any evidence of their paths. I've moved the trap several time with no success. From inside the house, I hear them in sections of the attic (about 3:00 am) that are completely inaccessible to me (because of firewalls.)
So I hired a pest extermination company. For $275 they put some poison bait stations outside, and three snap traps in the attic that are baited with a beef jerkey substance. The traps are near the attic access panel - not near the rat noise activity. The guy's reply was that the scent would lure them. He also reviewed my hole-plugging and said it was fine. He didn't get onto my roof. It's been three days and I check the snap traps in the morning and around dusk each night.
My questions are:
1. Is it safe to assume that the rat(s) sleep in my house during the day and at night they are coming and going outside? Does this mean I've missed an access point?
2. Considering the inaccessibility, is it common to drill a hole in the ceiling (like a 4" hole for recessed lighting) to place traps in the attic for those inaccessible places? If I drill a hole, then I can stick a camera up there and take pictures to look for evidence, place the traps, monitor them, etc. But then I've got a hole to deal with.
3. Is it worth parking myself on the roof and patiently waiting to see where the rats are coming and going?
4. Have I given the beef jerkey snap-traps enough time to do their thing? Any other advice? Thanks for your help!
Los Angeles Rat Control Tip of The Week
How Do Rats Use Pheromones To Communicate?
Releaser Pheromones:
Rats communicate using releaser pheromones to send information to other rats that they are in their own territory. Rats often urinate in areas to send information that they are ready to nurse or that a specific area where their nest is located is their own. Rats use these releaser pheromones to claim territory and to make sure that other rats will stay away.
Primer Pheromones:
Primer pheromones are designed to be excreted during the peak of fertility and this is the type of pheromone that sends sexual signals to males in the area. These scents are released in order to attract males and to make sure that the female is going to mate during a time where she is more than likely to conceive.
Primer pheromones are some of the main types of communication tools used by rats and it's one of the most powerful ones that can be sensed in the area. These responses are triggered by the area of the brain called the Vomeronasal and this refers to the overall sense that an adult male gets of the pheromone.
Information Pheromones:
These types of pheromones are designed to be useful for identifying something about the animals or about the area. Rats often use these to convey fear or to share information about an area. Certain species of rats can share information about a food source, safe space, and more with these types of pheromones. Most of the time informational pheromones are designed to identify the smell of other species and to warn other rats of dangers in the area.
Scientists are continuing to study rats to determine the total number of ways that they are able to communicate by pheromones alone.
