Guarding dinner!

Every morning when I am having breakfast there is usually a fat, furry squirrel or two outside the kitchen window having a peanut breakfast. As we had more snow last night there were two of them today and they spent much longer than normal filling up so were outside for a considerable time.
I wanted to go out to put some more raisins and cheese out for the blackbird and robin as there seemed to be enough of the seeds and suet pellets but I know that they are rather partial to the dried fruit and cheese. Well, we have treats so why not the birds, especially in this weather. The water had frozen too so I needed to thaw this out but I waited until the squirrels had finished and left before I went out. As I did so, the blackbird flew over the fence but I hoped that I hadn't scared him too much and that he would soon come back. He flew up to the roof and watched while I dealt with the water and replenished the bird table with goodies and within a few minutes of me closing the back door he was on the bird table.
Leaving him to it, I carried on with a few bits and pieces and next time I looked out, the robin was tucking in and the blackbird was nowhere to be seen. A little later in the afternoon I saw the blackbird sitting on the bird table again and didn't think anything of it at the time. However, about fifteen minutes later I looked out and he hadn't moved so I wondered if he was alright. I know the crows had been out shortly before and they were chasing off a magpie because the commotion went on for quite a few minutes and I had watched four of them chasing the magpie mercilessly.
Anyway, the blackbird seemed to be perfectly alright and sat there for about half an hour in all before having some more to eat and then flying off as it got dark.
Now I know this may be strange behaviour, but I think he was protecting his food. After all, there have been reports on the local news about flocks of fieldfares and redwings coming to gardens in the West country over the last few days and I had seen a pair of redwings in my own garden the other day. What is even more strange are the reports that the redwings are chasing the local blackbirds off the shrubs, bushes and trees with the berries on in the posher parts of the city.
Perhaps this blackbird had heard this too and decided that no one was going to get his raisins and cheese! What do you think?