Many of us feed hummingbirds. During much of the year these tiny birds survive on nectar, the sugary fluid produced by flowers in order to attract pollinators. Hummingbirds eat “meals” as do humans – a relatively large and quick intake of food. Whatever the concentration of nectar, the birds will eat something like 5-14 times their weight in nectar every day! They use a lot of this food energy to fly forwards and backwards, hover, and perch, but save enough to make it through the night without eating, although on cold nights they can drop their body temperature to save energy. Beating wings at 60-80 times a second with a heartbeat that can reach 1200 beats a minute uses a lot of calories!
Nectar means “drink of the gods” and is composed of a combination of sucrose (table sugar), glucose and fructose. Nectar also contains very small amounts of protein, and sodium and potassium salts. The amount of nectar in a flower varies from 10-100 calories, averaging about 30. So, if you feed hummingbirds, there is no special sugar concentration to use. During breeding season, hummers also eat insects because they are high in protein; nectar is very low in protein.
Other birds eat nectar as well, such as orioles, finches, and even woodpeckers.
If you feed hummingbirds a high concentration of sugar water, it will keep the birds around longer, but they will not feed as often. If you feed them a more dilute solution, they will feed more and you will see them more, which is really the reason you feed them, right? The other downside of a concentrated solution is that sugar crystals can accumulate on a bird’s bill and attract bacteria and make the feeder harder to clean. A 4:1 solution of water:sugar is more than enough; I prefer 5:1. And it is very important to keep your feeders clean.
Red coloration is attractive to hummingbirds because flowering plants and birds co-evolved with the flowers taking advantage of birds’ abilities to fly by attracting birds with nectar and shaping their flowers to be accessible to hummingbirds; the birds reciprocate by transferring pollen. Should you avoid red food coloring in the nectar? Although it’s not necessary as most feeders have red parts, there is no evidence that the dye is harmful to the birds.But it’s not necessary.
Will hummingbirds stop their migration in the fall if you feed them? No. Their migratory instinct is controlled by the length of daylight, not food supply. And if you go away for a few days or a week or two, you can let the hummer feeders go dry – the birds have other sources of food and they will not starve. Ruby-throated Hummingbirds of the eastern U.S. fly 500 miles non-stop over the Gulf of Mexico on their migration, so they have mechanisms to conserve energy when they need it
There are 363 species of hummingbirds in the world, the vast majority in South and Central America .