Whilst busily photographing my new obsession (spiders) I noticed what I think of as an ant dairy. Read about it here. That's when another couple of photos I'd taken a few weeks ago made sense.
This lady beetle was on my lime tree (thanks again Pam) and I noticed everywhere the beetle went, this ant went too. The ant was running the beetle off his ranch apparently because, although I didn't notice it at the time, there are aphids on the lime and lady beetles love to eat aphids. More about that here. I'd best go and get rid of them or I won't get any limes as all the goodness will be sucked out of the bush by the aphids.