Like many, you likely find yourself hunting for hours in Red Dead Online.
Especially if that involves hunting a legendary animal.
Here's how to hunt and find the Legendary Ghost Panther.
Legendary Ghost Panther
The Legendary Ghost Panther can only be found when in free roam.
The highest chance of it spawning is between 8 pm and 8 am.
Best conditions would be foggy or rainy weather.
You can find the Panther in the locations marked in the yellow circle below.
Source: GTA Series Videos on Youtube
You'll have to do a few things to complete the compendium in the animal field guide including:
You won't be able to take a sample and skin the animal in the same encounter.
Meaning you'll have to find the legendary animal twice to complete the compendium entry.