Dye-marking of Great Egrets (Ardea alba) and Great Blue Herons (Ardea herodias) was conducted in an intertidal salt marsh in South Carolina, USA, as part of a study on wader energetics and bird/dolphin interactions. We used remotely-triggered Spraymore paintball land mines to apply dye. These compressed gas-powered mines were portable, re-useable, and capable of spraying any liquid. Using an inkjet printer ink-based dye, we were able to successfully mark and re-identify one Great Blue Heron and one Great Egret. No apparent long-term behavioral changes were observed in marked birds, which were re-sighted in the same areas and engaged in normal behaviors following the application of dye. Dye markings lasted as long as 44 days. The use of Spraymore paint mines is a viable option for marking any birds that regularly return to specific observable areas, particularly when birds in these areas are not easily marked or captured using traditional methods.