Marticar

Marticar is a Fen Strider that wonders through the zone of Zangarmarsh. He has 3 different spawn areas and 3 different paths that he uses. He can most commonly be found on the far western one. However you'll want to check all 3 regardless. He is very easily distinguishable amongst the other Fen Striders because he is pure white in color, while the other ones are blue.

If you're looking for a place to farm I recommend the far western pathing, anything over here works. Or if you need Glowcaps, farm for them just remember to check for Marticar every 10-15 minutes.

Marticar Spawn Locations