The inlet cut down beside the house. The iguanas were incredibly well camouflaged in the leaves, but they were there. The Desert Iguana is a moderately sized animal in Red Dead Redemption 2. This page covers the Desert Iguana location in RDR2, and how to get a Perfect Iguana Skin. I could shoot into the mangrove and any shot that made it through would still end up in the bay. They were accustomed to boats coming and going and paid no attention to me until I started shooting. Also, shooting iguanas on someone elses property (or your bullet entering their property in any way) is considered trespassing unless you have their prior, written permission. The water approach worked.