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.
Best Plants to Attract Hummingbirds. Hummingbird flowers evolved at the same time as hummingbirds, developing specific features that don't allow access to other birds. The best flowers are tubular, scentless, brightly colored (often red, orange, or blue), and grow where it's easy for the birds to hover and sip.