Ants of Saudi Arabia

There are several species of ant living in Saudi Arabia. The technical names for the two most common are the little brown one and the bigger black one. 
Both will occasionally invade your home at the change of seasons. Note that Saudi Arabia does not change seasons using the familiar solstices and equinoxes. Saudi Arabia has hot-to-cold and cold-to-hot.
The little brown ants appear to be highly organized. You can go to bed at night without a single ant in your house, and when you wake up in the morning, every single crumb of food that you didn't wipe up will be swarming with them. This type of ant follows well defined trails, so it is fairly easy to get rid of them by wiping them up with a wet rag, or by vacuuming them up. Be sure to dispose of the vacuum bag immediately afterwards, or be prepared to dispose of your entire vacuum cleaner, and possibly the closet you keep it in. It is possible to follow their trails to the point where they enter your home and put a little poison there which seems to deter them from further entry. It may also be possible to trail them outside your home to the point of origin. One invading horde was trailed to the airport where they had what appeared to be tiny boarding pass stubs. Highly organized.
The larger black ones don't invade so much as infiltrate. This is a more evolutionarily stable ant strategy than invading like Attila the Ant because you are unable to find their point of entry. One day 4 or 5 of black ants will be milling around in your kitchen, apparently trying to blend in with the white floor tiles. They can be easily wiped up with a wet tissue, but 4 or 5 of them are back again the next day, milling around. You wipe them up again, again they return. This can go on for some time, and you may come to view them as room mates. This is, of course, their objective. First they lull you into a false sense of security, and then D-Day style, make off with the entire contents of your pantry.