Under stress from a historic drought, large swathes of forest and wetlands in central South America known for their exceptional biodiversity have been ravaged by devastating fires.

Experts say the wildfires in a region that spans Argentina, Brazil, Bolivia, and Paraguay – especially the region between the Paraguay, Paraná, and Uruguay rivers – have become critical in 2020.

The Pantanal – the world's largest wetlands that span Brazil, Bolivia, and Paraguay – is experiencing its worst drought in 47 years.

The Paraná river – one of the most powerful on the planet that originates in Brazil and empties into the River Plate estuary – is at its lowest level since 1970.

In August it was down to 80-centimeters in Rosario, eastern Argentina, rather than the usual 3-4 meters for that time of year.

It's the same thing with the Paraguay river that is at its lowest level "in half a century," according to Paraguay's national weather center in Asunción.

The fires are being fanned by ideal conditions, including strong winds, temperatures over 40 degrees Celsius (104 Fahrenheit), and the dry season in which farmers use slash-and-burn techniques to try to regenerate the soil.

Paraguay's capital Asunción and several towns in northeastern Argentina and southern Brazil spent days and even weeks submerged under a thick fog due to the intense fires.

And without the usual rainfall that moistens the soil, the wetlands have been particularly badly affected.

Images from the Brazilian Pantanal of the charred carcasses of birds, snakes, caimans, and trees have shocked the world.

A quarter of the area was devastated between January and September, while the Paraguayan Pantanal had already been badly affected by fires in 2019.

The Paraná Delta that is home to species such as the jaguar, Pampas cat, and several rodents, has been hit by fires of an unprecedented intensity since January, leaving a "desert of ashes" over tens of thousands of hectares of wetlands.

Agriculture is a massive source of income for the countries in this region but the slash-and-burn techniques used to aggravate the situation.

In the north of Argentina "despite Covid-19 restrictions, between March 15 and September 30... twice the area of Buenos Aires was deforested," according to Greenpeace.

The Mighty Earth NGO says that Paraguay's dry forests are "one of the main sites of deforestation in the world, mostly due to the expansion of pastureland and more recently soybean plantations."

Argentina's government has accused cattle farmers of setting fires to "increase pastureland area" in the Paraná Delta.

SHOTLIST

1. Various of fire in the forest of Santa Fe, Argentina

2. Various of firefighters work

3. Various of the area destroyed by fire

4. Various of tanker planes

5. Various of fires in Brazil

6. Various of firefighters work

7. Various of fires in South America from the air

8. Various of tanker planes

STORYLINE:

Under stress from a historic drought, large swathes of forest and wetlands in central South America known for their exceptional biodiversity have been ravaged by devastating fires.

Experts say the wildfires in a region that spans Argentina, Brazil, Bolivia and Paraguay – especially the region between the Paraguay, Paraná and Uruguay rivers – have become critical in 2020.

The Pantanal – the world's largest wetlands that span Brazil, Bolivia and Paraguay – is experiencing its worst drought in 47 years.

The Paraná river – one of the most powerful on the planet that originates in Brazil and empties into the River Plate estuary – is at its lowest level since 1970.

In August it was down to 80-centimetres in Rosario, eastern Argentina, rather than the usual 3-4 meters for that time of year.

It's the same thing with the Paraguay river that is at its lowest level "in half a century," according to Paraguay's national weather centre in Asunción.

The fires are being fanned by ideal conditions, including strong winds, temperatures over 40 degrees Celsius (104 Fahrenheit) and the dry season in which farmers use slash-and-burn techniques to try to regenerate the soil.

Paraguay's capital Asunción and several towns in northeastern Argentina and southern Brazil spent days and even weeks submerged under a thick fog due to the intense fires.

And without the usual rainfall that moistens the soil, the wetlands have been particularly badly affected.

Images from the Brazilian Pantanal of the charred carcases of birds, snakes, caimans and trees have shocked the world.

A quarter of the area was devastated between January and September, while the Paraguayan Pantanal had already been badly affected by fires in 2019.

The Paraná Delta that is home to species such as the jaguar, Pampas cat and several rodents, has been hit by fires of an unprecedented intensity since January, leaving a "desert of ashes" over tens of thousands of hectares of wetlands.

Agriculture is a massive source of income for the countries in this region but the slash-and-burn techniques used aggravate the situation.

In the north of Argentina "despite Covid-19 restrictions, between March 15 and September 30... twice the area of Buenos Aires was deforested," according to Greenpeace.

The Mighty Earth NGO says that Paraguay's dry forests are "one of the main sites of deforestation in the world, mostly due to the expansion of pastureland and more recently soybean plantations."

Argentina's government has accused cattle farmers of setting fires to "increase pastureland area" in the Paraná Delta.