What is a crested bird?

Morphological characteristics? Hummingbirds usually have blue or green feathers, and their lower bodies are lighter. Some males have crests or slender tail feathers. Most males are blue-green, some are purple, red or yellow. The feathers on the female bird are dull.

Metabolism? In order to adapt to the rapid flapping of wings, hummingbirds have the fastest metabolism of all animals. Their heart rate can reach 500 beats per minute! Hummingbirds consume far more food than their own weight every day. In order to get a lot of food, they must eat hundreds of flowers every day. Sometimes hummingbirds have to endure hunger for hours. In order to adapt to this situation, they can slow down their metabolism at night or when food is not easy to get. Entering a state similar to hibernation is called "hibernation". During hibernation, the heart rate and respiratory rate will slow down to reduce the demand for food. Flying speed Hummingbirds fly at a speed of 90km/h, which can reach 100km/h ...?

Life span There is little research data about the life span of hummingbirds. Most experts believe that the average life span of hummingbirds is 3-4 years. Under artificial propagation, the life span of hummingbirds can reach 10 years, while the life span of blue-breasted hummingbirds recorded in the field is only 7 years. Food Hummingbirds like flowering plants (especially red flowers), including shrimp flowers, flowers hanging upside down (also called bell flowers) and plants catching bells and willows. Hummingbirds feed on the nectar of these plants. They are also important pollinators, especially those with long sleeves. Most hummingbirds also feed on insects. ?

Breeding males do not participate in nesting, and females nest alone. Hummingbirds' nests are cup-shaped fabrics, which are usually hung on branches, caves, rock surfaces or large leaves. Hummingbirds lay two very small white eggs at a time, but they are still relatively large compared with the size of birds. The incubation period of eggs is usually 15- 19 days. Hummingbirds can use bottles, especially red ones. Suitable artificial nectar consists of one part sucrose and four parts water. Sucrose is most easily dissolved in boiling water, and then it is completely cooled before being eaten by hummingbirds. Things other than sugar, such as honey, ferment too fast, so it will hurt birds. There are also some hummingbird foods for sale, but they usually contain unwanted red pigments. It is reported that pigment can poison hummingbirds. The use of red flower-shaped utensils will have a good attraction effect. Hummingbird food also contains a small amount of nutrients, but hummingbirds obviously get nutrients from the insects they prey on, so they don't need nutrients. Therefore, sugar and water can make the best nectar. Hummingbirds' "milk bottles" should be cleaned once a week and replaced with sugar water, or more frequently if the climate is warm. Replace it at least once a month, otherwise it must be replaced if there is black mold. The "milk bottle" should be soaked in chlorine bleaching powder solution. Hummingbirds don't want to use a "bottle" washed with soap. They don't like the taste of soap.