The diploid germ cells that have the potential to develop into ova are called oogonia. In humans, all of a female's oogonia that she will make in her lifetime are created when she's still a fetus and hasn't even been born yet.
How do hummingbirds reproduce? To attract hummingbirds to a garden or feeder, rich, bright colors should be used. Red is known to attract hummingbirds from afar but does not have to be the sole color used. Hummingbirds like both annuals and perennials, as long as the colors in the flowers are vibrant.
OK, to answer your question, yes hummers are really attacted to the color red. But stay away from red dye. Check out http://www.hummingbirds.net/dye.html. If you want to add red, you can use red duck tape on the feeders. For lots of good HB information check out website: http://www.hummingbirds.net/index.html. Regarding whether a red umbrella is the answer to your question, I can't say.