Daylight Home Invasion Strikes Corozal Residence!

I would sure like to know what triggers the army ants to invade. This is the forth time since we've moved in.

 The ants go marching one by one,
Hurrah, hurrah.
The ants go marching one by one,
Hurrah, hurrah.
The ants go marching one by one.
The little one stops to chew some gum.
And they all go marching,
Down... to the ground...
To get out... of the rain.
Boom, boom, boom boom.

Coming Over the Front Fence

All Over the Trash Bin

Again, as usual, Dianna noticed them on the porch - a scouting party, and raised the alarm. I promptly went downstairs and retrieved the kitty carriers. We put Blue and Midas in them, grabbed our books and a few beers and headed out to the guest house. Last invasion, that was our safe refuge, so that was the logical choice again.

It was plain to see that there were quite a few more involved in this operation than the last times. And, it was in the daytime, just about twelve-noon to be precise, instead of eight or nine at night, which would be past our bedtime.

Three-Way Intersection - No Traffic Tie-ups

In the back (street-side) breezeway, there were a lot of ants. The picture above shows a three-way intersection. I just recently read a thing on Reddit (http://www.reddit.com/) about how traffic engineers are looking at ants as they never seem to have traffic jams no matter how congested things become. The three-way above seems to be a good example. I watched them for a few minutes, trying to make sure none got on me as their bite smarts a bit, and they never did jam up.

Down At Their Level - Pretty Formidable

Just about an hour and a half into the invasion, we noticed ants coming up the stairs to the guest house, which was a first for us. I did a quick reconnoiter of the main house. It was almost completely clear of ants, so we grabbed the beer and the kitties and migrated back to the house.

I checked the fence and guest house a short time ago and the coast is clear. As I mentioned at the beginning, how do the ants decide when to invade? I think they have some geckos as paid informants. There has to be something like that. It just can't be random, can it?