Someone has been despatched to check the lineside fences in the area are secure. I am no expert but I suspect if it was a kangaroo it could jump over the sort of fences we have beside our tracks.
https://factanimal.com/animal-facts/highest-jumping-animals-in-the-world/The red kangaroo is the largest species of kangaroo. They can grow to be around 1.4 meters long, with a tail that’s around 1 meter long.
This large size, paired with their muscle mass, allows for them to reach amazing heights with each and every jump. On average they can jump 25-30 ft in a single bound.
But just how high can the red kangaroo jump? While often they are not witnessed jumping higher than 1.5 m (5 ft), there is a credible record of a red kangaroo jumping over a stacked pile of wood at a height of 3.1 meters (10 ft).
https://www.fwi.co.uk/business/business-management/railway-fencing-safety-what-livestock-farmers-need-to-knowTypically, fences are 1.8m high, but this is subject to the type of land use adjacent to it, Ms Wilkinson says.
Inspectors will identify what the land is being used for during annual checks and make recommendations if fencing needs to be upgraded.
Network Rail may, in certain circumstances, downgrade the fence type if inspectors think it is safe to do so.