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These puppets are making a 20,000km journey.
They began their trip in the Democratic Republic of the Congo on the 9th April.
The puppets are a piece of artwork which is called The Herds.
The project warns us about climate change.
It shows animals running away from their homes due to the problem.
The project organiser, David Lan, explains how the number of animals grows as it goes along.
The group arrived in London after moving north, through Spain and France.
Many humans escape their home countries on the same route.
The puppets are made of materials like cardboard, which are biodegradable.
But the artists also had to use rubber parts, to let the animals move.
Soon the animal puppets will stop in Norway, to visit the ancient Sami people.
In August, they'll complete their amazing journey in the Arctic Circle.
The artistic director of the project describes The Herds as an important warning.
Its aim is to call for real change to stop the climate crisis.
It hopes people across the world will do something.
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