A Snowbird in Paradise

There he was, just singing and singing in the top of this tree. I couldn't even see him until he flew to this branch from another.

According to All About Birds (see link in my list of links)

A familiar and abundant small colorful bird, the American Goldfinch is frequently found in weedy fields and visiting feeders. It shows a particular fondness for thistles, eating the seeds and using the down to line its nest.

• Small bird.
• Bill small, pointed, conical, and pink.
• Body bright yellow to dull brown.
• Wings dark with large white wingbars.
• Tail short and notched.
• Breeding male bright yellow with black cap and wings.
• Size: 11-13 cm (4-5 in)
• Wingspan: 19-22 cm (7-9 in)
• Weight: 11-20 g (0.39-0.71 ounces)