The gypsy moth, Lepidoptera, Coccidae, is a worldwide pest. Its larvae eat leaves and lick fruits. A small egg block can hatch more than 200 gypsy moth larvae. The invasion of gypsy moth is the most widely studied species invasion in history.
The lamprey lamprey is similar in shape to snakes and eels. There are seven independent gill holes on both sides of the head behind the eyes, which are arranged in a straight line with the eyes, so it is commonly known as octopus. They rely on sucker-shaped mouths to catch big fish moving in the same direction with them, and are led forward by them, sucking their blood and meat, leaving fatal scars on their prey, and even leading to the death of their prey.
Beaver Beaver mainly "invades" rivers, valleys, lakes and ponds. Some reed marshes are particularly difficult to escape. They dig holes and destroy riverbeds and dams, feeding on the buds and roots of reeds, threatening the living environment of some rare swamp birds and destroying their habitats.
The fingernail-sized mollusk zebra shell can breed 700,000 per square meter. They not only block sewers and turbines of hydropower stations, but also plunder a large number of plankton to maintain their own reproduction, seriously destroying the ecological balance.
Goats are the most common animals raised by human beings. Goats eat plants from all over the world, bully other animals, compete for shelter and increase soil erosion. In Galapagos, goats compete to feed on slow-moving giant turtles and invade their nests. Goat critics say overgrazing has led to serious soil desertification in Africa.
Although pigs are one of the cleanest animals on earth, a large number of pig farms produce a lot of stinky pig manure. For example, a pig farm with 2.5 million pigs produces pig manure equivalent to garbage in Los Angeles in one year. These disgusting pig droppings contain a lot of endocrine-disrupting chemicals.
Elephants, with an amazing appetite, can do anything but be rude "giants". They uprooted trees and plundered farmers' crops. In Africa, they eat the fruits, leaves and bark of their favorite elephant tree (Marula), and often kill this tree in the process of eating.
There are hundreds of species of bark beetles, and its worst behavior is to eat all branches, branches, trunks and shrubs. Because of drought and disease, these insects prefer to attack these "weak" trees and kill them. A large number of trees in the southwestern United States were knocked down by beetles, which aggravated the spread of forest fires.
Tortoise bite
Red-billed acacia
If domestic piranhas enter natural waters, they will soon form a population, which will destroy the ecological balance of natural waters incalculably.
Python has posed a serious threat to the ecology of the western United States.
Asian carp
mongoose
Water retaining stake
Ambrosia trifoliata invading China will lead to "hay fever" which is harmful to health.
mosquito
Fire ants originated in South America, and were accidentally introduced to the United States in the1930s. So far, thirteen states in the United States have been invaded by fire ants, and the West Indies are also threatened by fire ants. Fire ants are very small, ranging in length from two to six millimeters, and the whole body is reddish brown.
Fire ants' nests are generally hemispherical and can be as high as 40 cm. Fire ant bites can cause burning sensation, which is especially dangerous for children. They will also destroy public facilities, such as the power sector. One of the biggest problems of fire ant invasion is its impact on the local ecosystem. Some indigenous ant species will soon disappear after the invasion of fire ants, and other reptiles and invertebrates are no exception. Further chain reactions will also involve plants and animals that depend on these small animals for survival.
Fire ants are fierce creatures, and sometimes they even attack frogs, lizards or other small mammals.
Pueraria lobata is a semi-woody leguminous vine with amazing spreading power and fecundity, which can cover trees and ground in a large area. It is estimated that kudzu vine spreads in the eastern United States at a rate of 2 million to 3 million hectares every year, resulting in reduced crop production, and the annual cost of killing kudzu vine reaches 500 million US dollars.
The semi-woody vines of kudzu vine can be as long as 10 to 30 meters, and the roots weigh several kilograms, which can go deep into the ground for one to five meters. It has huge leaves and red and purple flowers. The leaves covered with bristles are three alternate leaves, 7 ~ 15 cm long, and the pods are flat, 5 ~ 10 cm long and about 1 cm wide.
The shape of the brown tree snake is very special: vertical pupils, erect fangs, a head that is too big for the proportion of the body, brown and green skin and a cross pattern. Palm snakes are eighteen inches when they hatch and can grow to three feet in the first year.
Lysimachia christinae is a perennial herb with thick woody roots and leaves around its main stem. Lysimachia can grow to four to ten feet tall, and flowers have five to seven petals. Melaleuca is extremely important and can quickly cover a large area of wetlands. As long as you go, the original local herbs and some flowering plants will generally become losers in the competition.
Euphorbia latifolia is a perennial plant with smooth and upright stems, many branches and leaves and small yellow flowers. Euphorbia latifolia will replace native plants in a short time. They will absorb most of the water and nutrients in the soil and release phytotoxins, which will make it difficult for other plants to survive. Euphorbia latifolia is an aggressive plant. Once rooted, it can be covered in a large area in a short time. Another advantage of Euphorbia latifolia is its high seed survival rate. Its seeds will survive in the soil for seven years after threshing, and will germinate as soon as they meet the right conditions.
African bees, also known as "killer bees" or "wild bees", are good at attacking people and animals in droves. This animal is easily provoked. People and animals within a quarter mile of Fiona Fang will be attacked as provocateurs. They are strong and fly fast. Now this dangerous insect is spreading rapidly in some parts of the United States.
The plant in the photo looks like a bunch of ordinary purple flowers, but this is a famous water hyacinth. In some areas of the United States, Australia and China, this plant blocked rivers and blocked traffic, resulting in the death of a large number of aquatic organisms due to lack of oxygen and sunshine. Although this plant can degrade and purify the polluted water, its rapid reproduction makes it one of the most aggressive and harmful plants.
Elaeagnus angustifolia is a small plant with thorns, which can grow to 30 feet high. Elaeagnus angustifolia can kill other plants by interfering with their absorption of water and nutrients. Elaeagnus angustifolia was first distributed in southeastern Europe and parts of western Asia, and now it is also distributed in parts of the United States.
Also known as Victoria perch, it is a large freshwater carnivorous fish. Nile perch can grow up to 200 kilograms, up to two meters long. Nile perch was introduced to Lake Victoria in Africa from 65438 to 0954. It not only competes with other fish for food, but also preys on a large number of other fish, resulting in the extinction of nearly 200 species of fish.
Tamarix ramosissima, also known as Tamarix ramosissima, is a very long-lived shrub plant, native to Asia and southeastern Europe, and now distributed in the United States and Mexico. This kind of plant can spread rapidly in the soil with high salt content. Because a large number of Taxodium ascendens will block the flood drainage channel, it will often induce flood spread.
The short-tailed ferret is a carnivore that feeds on small mammals and birds. Sometimes they attack animals bigger than them. They will store some surplus prey to tide over the food shortage. Now in parts of New Zealand and other countries, short-tailed weasels have spread all over the country, and the distribution area is still expanding. ?