Emotions were running high in the camp on the outskirts of the northern French port city of Calais near the entrance to the Channel tunnel, with many residents refusing to leave despite a 1900 GMT deadline to vacate its southern half.
Charities working in the Jungle had been nervously awaiting a ruling from a court in Lille, where they had challenged the eviction order.
But the court said a decision was not possible before tomorrow or Thursday, as it began hearing testimony from 250 migrants and 10 NGOs.
Meanwhile, Belgium said it had temporarily reintroduced border controls with France to halt a feared influx of migrants, notably to the port of Zeebrugge in hopes of getting on a ferry to Britain.
More From This Section
"We have informed the European Commission that we will temporarily depart from Schengen rules," Interior Minister Jan Jambon said in Brussels in the latest blow to Europe's 26-country borderless zone.
"We will carry out border controls at different strategic locations, at spots used by smugglers which the police have detected," he said.
"We want to avoid tent camps like Calais in Belgium at all costs. It's a question of maintaining order," Jambon said.
The Jungle has also played into fraught discussions about Britain's possible exit from the European Union.
Some British opponents of "Brexit" say they would lose the ability to call on France to stop the flow of refugees sneaking aboard lorries and ferries in Calais if Britain leaves the EU.
The migrants in Calais make up a tiny fraction of those fleeing war and poverty in the Middle East and Africa.
Many Jungle residents appeared to be standing firm.
"I don't have anywhere else to go," said John, a 28-year-old Sudanese national.
"We don't want to leave Calais because we don't want to get further away from England, which is still our goal.