What ants call sky fires is wildfires, also known as wildfires or forest fires.

Wildfires are a natural phenomenon, and for nature, they are bad, but not necessarily all bad.

Since the emergence of forests and grasslands on Earth, wildland fires have been accompanied by fires. On average, more than 100,000 wildfires occur annually on the North American continent, and these wildfires can destroy between 400 and 5 million acres (about 1.6 million to 2 million hectares) of land. On average, there are more than 200,000 forest fires in the world every year, and the burned forest area accounts for more than 1‰ of the world's total forest area.

There are generally three conditions for wildfires to occur: fuel, oxygen, and a heat source. Fuel is any combustible object around the flame, including trees, grasses, shrubs, and the more fuel, the bigger the fire. The air provides the oxygen needed for wildfires to burn. Heat sources can increase the temperature of the fuel until it catches fire, and lightning, hot wind, or even the sun can provide enough heat to start a wildfire.

In dry and dry weather, nature turns greenery into dry fuel, high winds can spread wildfires quickly, and hot temperatures speed up the burning process.

Wildfires move at speeds of more than twenty kilometers per hour, and are powerful enough to consume everything in their path, whether trees, shrubs or meadows.

Runaway wildfires, fueled by the wind, quickly ignite dry bushland, and wildfires can completely burn acres of woods in just a few minutes. Some wildfires can burn for weeks, destroying tens of thousands of acres of pastures and forests.

Wildfires are not uncommon, wildfires occur in most parts of the world, and some hot and dry areas have become wildfire-prone areas, and frequent thunder can create the perfect conditions for wildfires to occur. If there is a hot wind, it usually fuels the fire, and a single flame can ignite trees for kilometers around.

Wildland fires are hugely harmful, killing and burning forest vegetation in large quantities, directly reducing forest area. On the one hand, it has caused the decline of forest stock, and on the other hand, it has also seriously affected the growth of forests. Forests are a renewable resource with a long growth cycle, and it takes a long time for them to recover after a fire. Especially after high-intensity large-scale forest fires, it is difficult for forests to recover their original appearance, and they are often replaced by secondary forests or shrubs. If it is repeatedly damaged by fire, it will become a barren grassland or even bare land.

Forests also contain abundant wild plant resources, however, wildfires can easily burn these precious wild plants, or due to fire disturbances, change the living environment, so that their numbers are significantly reduced, and even some species become extinct.

Moreover, wildfires can seriously damage the ecological structure and ecological environment, leading to the imbalance of the ecosystem, the decline of biomass, and the weakening of productivity.

The wild is home to a variety of exotic animals. When forests and grasslands and other wild places are hit by fires, they will destroy the environment in which wild animals depend, and sometimes even directly burn or burn a large number of wild animals.

High-intensity fires can also destroy the chemical and physical properties of the soil, reduce the water retention and permeability of the soil, and raise the groundwater level of some woodlands and low-lying lands, causing swamping; In addition, due to the carbonization and warming of the soil surface, it will also accelerate the drying of burned land, resulting in the overgrowth of positive weeds, which is not conducive to forest regeneration or causes the replacement of low-value forests that are tolerant to extreme ecological conditions.

Forests and grasslands have the function of conserving water and maintaining water and soil, and the mechanical action of branches and leaves and forest beds (ground cover layer) can greatly reduce the impact of rainwater on the surface. The spongy litter layer on the surface of the woodland not only has the effect of rainwater impact, but also absorbs a large amount of water. In addition, the huge root system of the forest fixes the soil, so that the forest land rarely experiences soil erosion. However, after a forest fire, this function of the forest is significantly weakened, and in severe cases, it even disappears. Therefore, severe forest fires can not only cause soil erosion, but also cause natural disasters such as flash floods and mudslides.

Wildfires can also pollute water bodies, causing large amounts of sediment and ash to be carried to downstream rivers or lakes, causing siltation in rivers and causing changes in nutrients in river waters, resulting in a significant decline in water quality, and changes in river water quality can seriously affect the survival of aquatic life.

In addition, wildfires can cause air pollution, burning produces large amounts of smoke, carbon monoxide, hydrocarbons, carbides, nitrogen oxides and particulate matter, which can cause air pollution and endanger wildlife when the content exceeds a certain limit.

Although wildfires often cause serious damage and damage to local ecosystems, naturally occurring wildfires also have their own unique role and positive side.

Wildfires slow the release of energy from ecosystems, promote the transformation of nutrients and species regeneration in ecosystems, and contribute to the health of ecosystems.

For example, wildfires burn dead or decaying plants and return nutrients to the soil. Wildfires also disinfect forest ecosystems by removing diseased plants and harmful insects; In addition, wildfires burn away thick foliage and low shrubs, allowing the bottom of the forest to soak up sunlight so that new seeds can sprout and grow, promoting the replacement of vegetation from generation to generation.

But for creatures that are on the verge of catastrophe, encountering a wildfire is a very unfortunate thing, and it is often impossible to escape.

Just like the protagonist is now, in the face of the raging wildfires, his mood has fallen to the bottom, and he no longer has the joy of the harvest two days ago.

The speed of the approach of the line of fire was extremely fast, and from a distance, from the skyline, the fire had come to a place not far from the river bank.

Although a large area of land in the vicinity is less wooded, mainly grass, shrubs, and scattered trees, the fire energy released by these dry vegetation is also terrifying.

As far as the eye could see, the flames were several meters high, and the heat and flames were churning above, distorting even the distant scene in the air.

Wildfire is like an impermeable wall, pushing all the way and crushing any resistance in front of it; Or like the cunning army, they know how to outflank and divide the tactics, first set fire to the flammable grass around them, and then reflexively destroy the surrounded trees bit by bit.

On the banks of the river, some of the big-headed ants who got the news were already running wildly, trying to escape back to their nests from the only bridge between the "Waterfront City" and the riverbank.

But there are more ants in the fields who don't know that danger has come, and even if the flying knights give orders everywhere, they can't find all their companions in the weeds of the fields.

As the wildfires approached, the air grew drier and hotter, the skies were no longer suitable for flying, and the Flying Knights had to abandon their mission and hide back in their lairs.