These ants are farmers and they herd, protect, and actually "milk" these aphids! They herd or carry the aphids to an optimum good source for them, and when the aphids suck sap from the plant they produce (poop out) honey dew. Ants love honey dew so they farm the aphids and milk the aphids for honeydew by stroking them with their antennae.
They work hard to protect the aphids from predators, rain, and even cold temperatures Some ants will actually carry them or their eggs into their nests to keep them warm in the cold weather or the winter - when the eggs hatch they will carry them to a source of food.
Interestingly, ant farmers are much more like human farmers than many think - going so far as to actually clip the wings off of aphids when they develop so that they cannot fly away and using a chemical on their (the ants') feet to tranquillize them or even to prevent the development of wings in the first place. In fact by tranquillizing the aphids, they are preventing the development of wings because the development is initiated by their brushing against each other in crowded conditions.
I received an inexpensive new macro lens for my iPhone in the mail the other day! I got it from Amazon - it's a "VicTsing 3 in 1 Clip-on Fisheye II +0.65x Wide Angle II + Macro Lens". I tried it out on these videos and it's really great! It works much better than a laser pointer lens held against the screen with a bobby pin and some tape. It's only 10x macro, however - so it doesn't capture anywhere near as much detail (nowhere near as much magnification) as the laser pointer lens. Because of that, I'll be using both lenses - just for different things.
Sorry about the shakiness - it was windy and raining and I was trying to balance a huge umbrella with both of my hands on my iPhone!
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