The shade of a big pecan tree in the yard can be a wonderful attraction when you're looking for a home.
Pecan trees love water and often grow in or near flood prone areas.
Ask the seller whether the property has ever flooded or if it is located in a flood hazard zone. One of the surveyor's jobs is to determine if the property is located in the 100-year Special Flood Hazard zone as designated by the U.S. Department of Housing and Urban Development, Federal Emergency Management Agency. But don't rely on the survey alone. It is not all that uncommon for some areas to flood even though they are not officially designated as being in the 100-year Special Flood Hazard Zone. Ask folks in the area whether their houses have ever flooded.