Each day 30,000 to 40,000 people cross the 315-meter-long (1,000-foot-long) Simon Bolivar bridge (pictured) between Venezuela and Colombia. Since September 2015 some 20 million Venezuelans have crossed into the neighboring Colombian province of Norte de Santander, says its governor William Villamizar. At the same time, he adds, 17 million individuals have been registered as entering Venezuela.

Most Venezuelans come to Colombia to stock up on basic food stuff and medicine. It is cheaper there than in their own country, where inflation has spiraled out of control and made the Bolivar, Venezuela's currency, nearly worthless. Some 3 million citizens are thought to have permanently migrated to Colombia.

Colombians initially welcomed fleeing Venezuelans with open arms, just like Germans welcomed refugees in summer 2015. But now, experts say, the mood has shifted. Many have begun demanding the government provide less financial support to refugees and instead invest more in helping ordinary Colombians. However, aid for refugees is still provided in reception centers (above).

According to official figures, approximately 1 million Venezuelan nationals currently reside in Colombia. Given that a total of 3 million Venezuelans crossed into Colombia, about 2 million must have traveled onward. In the first half of 2018 alone, over 500,000 of them migrated to Colombia's southern neighbor Ecuador.

Ecuadorian authorities estimate that only 20 percent of Venezuelan nationals who arrived in the country in 2018 permanently settled there, like this family living in a makeshift camp near the capital, Quito. Most Venezuelans presumably intend to keep on traveling southward and reach either Peru, Chile or Argentina.

After several days when some 5,000 Venezuelans wanted to cross from Colombia into Ecuador, Quito began demanding that Venezuelan nationals show valid passports to emigrate, rather than just an ID as was previously needed. This new regulation applies to adults. For children, proof of paternity and parental passports is enough to let them cross the border.

After Ecuador Peru followed suit, announcing it would implement the same regulation in the near future. Peruvian Interior Minister Mauro Medina said that about 80 percent of Venezuelan refugees arrive with valid passports, but many Venezuelan NGOs warn that passports have now become luxury items in the crisis-stricken country, requiring large sums of cash or high-level contacts to acquire one.

More than 100,000 Venezuelans have migrated to Brazil since 2016, most of them to the country's north. From there, roughly half them travel onward to Ecuador and Peru. The situation in northern Brazil is tense: The country's government has said it will redistribute Venezuelan immigrants to other regions. Critics have accused the government authorities of failing to support Brazil's border region.

Last weekend, local residents in the Brazilian border town of Pacaraima attacked makeshift camps housing Venezuelan refugees. They set their dwellings on fire and drove hundreds back across the border. Media reports say Brazilian police did nothing to stop the mob violence. The attack was said to be triggered by the robbery of a Brazilian businessman — a crime allegedly committed by refugees.