I believe everyone has written essays, especially expository essays that cannot be ignored in essays. Some expository essays are ordered by time, and some are ordered by space; some are written from phenomenon to essence, and some are written by the master. Some of them are explained in the order of the process flow, and some are explained in the order of the nature, function, principle, etc. of things. How should we write this type of composition? Below are 5 selected 300-word expository essays about hummingbirds that I have collected for everyone. They are for reference only. You are welcome to read them. Selected 5 expository essays about hummingbirds, 300 words each 1

During my autumn outing, I made an animal friend, a hummingbird. Want to know how I met it? Let me tell you!

At that time, my classmates and I were eating the love lunches carefully made by our respective parents. At this moment, I saw it - the hummingbird. Its body is so small, so light, and comes in four colors: red, yellow, blue, and green. As for its wings that flap so fast, I don't know, because it flaps so fast that I can't see it clearly!

When I first saw it, I didn’t believe it. I didn’t believe it was a hummingbird. But this bird is about the same size as a bee. Who else could it be besides a hummingbird? After thinking about it for about half a minute, I excitedly called my friends to see the hummingbirds. But it seemed to have heard my cry, and seemed to be very afraid of others. With a "swish" sound, it disappeared among the flowers.

I think it must just want to make friends with me! Selected 5 expository essays on hummingbirds of 300 words 2

Hummingbirds are the smallest birds in the world. Their bodies are no more than 7 centimeters, their weight is only 1 to 2 grams, and they have only more than 900 feathers. The body of the green hummingbird is about 5.8 centimeters long, smaller than a horsefly and less thick than a bumblebee. Its slender mouth and tail take up 4 centimeters, and its weight is only 2 grams. The eggs it lays weigh 0.2 grams, which is about the same as a pea. It is the smallest egg among birds.

The hummingbird is too small to easily preserve its skeleton as a fossil, and its evolutionary history remains a mystery. Most of today's hummingbirds live in Central and South America. Fossils of hummingbirds from 1 million years ago have been found in South America. Therefore, scientists believe that hummingbirds originated from the Pleistocene. However, scientists in southern Germany have discovered the oldest hummingbird fossil in the world, which is more than 30 million years old. It can be seen that the ancestors of hummingbirds have appeared as far back as the Oligocene Epoch.

The tail of the male hummingbird is the most unique among birds. Its tail has only four feathers, the two in the middle are spike-shaped, and two long feathers stretch out on both sides. The top is swollen, like a small tail. "Tuanfan" is extremely beautiful. From Mexico to Argentina, there is a kind of green hummingbird, which is the smallest among hummingbirds. Its feathers are green, and only its tail feathers are purple-blue. Its beak is a thin needle and its tongue is a slender thread; its eyes are like two shining black spots; the feathers on its wings are very thin and seem to be transparent; its legs are short and small, It is not easily noticed; it rarely uses its feet, stopping only to spend the night; it flies continuously and very quickly, making a buzzing sound. The flapping of its wings is very rapid, so when it stays in the air, not only does it maintain its shape, but it also appears to be motionless, hovering like a helicopter.

Hummingbirds like flowering plants (especially red flowers), including small shrimp flowers, fuchsias (also known as bell flowers), and plants such as fishing bells and willows. Hummingbirds feed on the nectar of these plants. They are also important pollinators, especially of long-tubed flowers. Most hummingbirds also feed on insects. It will stay motionless in front of a flower for a moment, and then fly towards another flower like an arrow. It uses its long and slender tongue to penetrate into their bosoms and suck their nectar.

The average lifespan of a hummingbird is 3 to 4 years. In captivity, hummingbirds can live up to 10 years, but the lifespan of blue-breasted hummingbirds recorded in the wild is only 7 years. Selected 5 expository essays on hummingbirds, 300 words each 3

You can always discover a lot of new things every time you go out for fun. The last time my father took me to travel to Zhangjiajie, the weather was not good that day, and it was drizzling. When we reached the top of Huangshizhai Mountain, although the rain had stopped, the surroundings were surrounded by thick white fog, and we could not see what the tour guide described. The spectacular scenery is really meaningless just based on imagination, and everyone was a little disappointed.

We passed by a Chinese medicine plantation. Suddenly, an animal as big as a butterfly flew over quickly. If we looked closely, we saw that it looked a bit like a bee, but it was much bigger than a bee. Its body is black and yellow, and its wings are shaking rapidly, making it almost invisible. Its head is like a small bird, with a long and pointed beak, which extends into the flower core from time to time, as if sucking nectar.

Everyone was very interested and took out their cameras to take pictures. This little animal doesn't seem to be afraid of people at all. It flies around among the flowers as it pleases, stopping in the air to suck nectar from time to time. Everyone was talking while taking photos: "What is this? It looks like a hummingbird?" Some people said: "How can it be a hummingbird? It is only found in South America." But it really looks like a hummingbird. It will be What? I was filled with questions. Dad said: "It doesn't matter, let's take a photo of it and go back and search the Internet."

We took a lot of photos, and then the "hummingbird" flew away leisurely.

When I returned to Shenzhen, I quickly asked my father to check the information, and we really found the same animal as the one we photographed.

It turns out that it is not a "hummingbird". Its real name is "Long-billed Hawkmoth", also known as "Chinese Hummingbird". It is actually an insect. Like a butterfly, it likes to be active during the day. It has a long beak as its mouthparts and colorful, beautiful and dazzling wings. It is also like a bee, its wings vibrate very quickly and make a buzzing sound, flying among the flowers to collect flowers. It eats nectar; it is also like a hummingbird, lying at night and emerging in the day, rarely resting, and can hover in mid-air.

The hawkmoth we see usually appears in Zhejiang and Hunan, but there is no information about its discovery in Zhangjiajie on the Internet.

Nature is so colorful, there are such magical little animals! It seems that as long as you pay attention everywhere, you will find many wonderful things. I look forward to encountering more new creatures. Selected 5 expository essays on hummingbirds, 300 words each 4

It is a collective name for about 600 species of hummingbirds in the order Swiftidae, and is the smallest known bird in the world. The hummingbird has a small body and can hover in the air by flapping its wings rapidly, about 15 to 80 times per second. Its speed depends on the size of the hummingbird. Among all animals, the hummingbird has the most beautiful body and the most colorful colors. The little hummingbird is a masterpiece of nature: light, fast, agile, elegant, and gorgeous in feathers, this little darling has it all. Hummingbirds are named for the buzzing sound they make by flapping their wings. Hummingbirds are the only birds that can fly backwards. Hummingbirds can also hover in the air and fly left and right. Hummingbirds are the smallest warm-blooded animals (endotherms) in the world.

Hummingbirds are the only birds that can fly backwards. Hummingbirds can also hover in the air and fly left and right. Hummingbirds are the most beautiful and colorful. The exquisite carvings and jade carvings cannot compare with this treasure of nature. The hummingbird is the smallest bird in the world and "is famous for its tiny size." The little hummingbird is a masterpiece of nature: light, fast, agile, elegant, gorgeous plumage - this little darling has it all. It shines with light like emeralds, rubies, and topaz. It never lets the dust on the ground stain its clothes. Moreover, it flies in the air all day long, only occasionally brushing against the grass; it shuttles between flowers, feeding them with nectar. For food.

Various hummingbirds are distributed in the hottest areas of the New World, mainly in South America. They are numerous, but they seem to be only active between the two tropics. Some extend their activity range to temperate zones in summer, but some also Only a short stay. Selected 5 expository essays on hummingbirds, 300 words each 5

It is said that the mouse is the smallest animal, and there are even smaller ones! They say the elephant is the most powerful animal on earth, and there is one more powerful than it! They say eggs are the lightest, but there is something even lighter!

Want to know what it is? It has a name "just like its bird" - hummingbird!

It weighs about 1 coin and is only 4 centimeters tall! But that’s not all! There is also a kind of hummingbird called the bee-sucking bird. It is a kind of hummingbird, but it is the lightest bird among hummingbirds and even among the creatures in the world! Its weight is 1.5 grams, and its height is only 25 centimeters! Isn't it light? !

Many people will take the honey-sucking bird as its name suggests - it feeds on nectar. Not really.

It has a persistent spirit - in nature, there are countless birds and beasts that are more powerful than it! But it is such a bird that occupies a place in nature. Let's say it and the eagle are both carnivores. The eagle is several times larger in size, but when it comes to food, even though it is Hundreds or even thousands of eagles arrived, but it didn't care! "Unity is strength", this sentence is well fulfilled in them. A flock of bee-sucking birds can drive away eagles, causing them to abandon their armor and flee! Aren't they powerful enough? !

Hummingbirds can defeat enemies by uniting. At this moment, you who are doing something in this world, can you also learn something from them? You may think it’s meaningless, but that’s the fact – brothers working together can be as powerful as gold!

Unite! Boys!