The blackbird on the fence

I'm fond of watching perching birds. You never know what they're up to; are they looking for food? For fellow birds? Resting? Do they simply like the place they've chosen to perch. I wonder what this blackbird was up to:

The blackbird looked up to where I was for couple of seconds before flying off to find something else interesting to do.

These two pictures were taken with my main camera on full optical zoom; the apparent dreariness in them is because they done through a window.