- All things bright and beautiful,
- All creatures great and small,
- All things wise and wonderful,
- The Lord God made them all.
-- from the eponymous hymn, see http://en.wikipedia.org/wiki/All_things_bright_and_beautiful
Songbirds have evolved a myriad of attractive colors, primarily to attract mates, but it has the side effect of making people like them more.
The two main branches of the order carnivora have evolved over tens of thousands of thousands of years into efficient hunters, predators, possessors by strength and cunning of other creatures' flesh. Can you love that "Tyger, Tyger, Burning Bright/In the forest of the night" knowing that it would kill and eat you given half a chance? Can you love a furry feline that will destroy a beautiful bird in the interest of a quick meal? Do you love the cat and the bird both? Equally? When a neighbour's dog or a wild carnivore eats your prized show poultry, where then is love?
Yet still I do love them all, for they are all creatures of our world
Update: In 2015 we discovered birdsbesafe.com which markets brightly-colored cat collars that birds are more likely to see than a drab-colored cat. Bird predation has dropped way off since then!