Here is a short write up and video on a project with TCEnergy. We installed 200 Nesting Post (bird nesting cavity) ROW markers in northern Ohio last spring. We were a bit late getting them installed this year (Covid) but were pleased to get bird use this summer anyway! Anticipating more use in 2021 and we are planning more installations in November. https://www.tcenergy.com/stories/2020/2020-10-13house-wren-families-call-special-tc-energy-pipeline-markers-home/