The last one was getting too large for comfort.
A news item on our local news caught my eye recently. Gilbert White the naturalist lived in a village in our area called Selborne. In the shed at his house they have noticed a robin feeding the brood of a thrush. The mother seesm quite happy to move over and let the robin feed her young and the robin snuggles in for warmth at night. They didn't show or mention any male blackbird in the scenario, but they did speculate that the robin may have lost his own mate and brood. (or maybe he thought the thrush was his mate who had let herself go and become a little overweight )

Rod