The elevated mist-net frame: A robust and versatile manoeuvrable design for capturing upper strata birds

Classic standard mist-netting limits sampling to understorey birds flying <3 m above-ground level. Methodological innovations targeting higher strata birds (and bats) are important for ecological studies, particularly in tropical forests. I present and evaluate a method of applying elevated mist-net frames (EMF) up to ~25–30 m. I designed detachable mobile alloy frames for standard-sized 3 × 6 m mist-nets, weighing ~11 kg including fittings, and suspended by three-point cable-wire mounting. State-of-the-art archery and fishing gear are employed for securing anchor lines, with hoisting applied by pulley, ropes and guys. Elevated mist-net frame is assembled and detached by two–three team members within 15–20 min, and up-down hoisting lasts 1–3 min. EMF excludes tree-climbing and arboreal platforms, through versatile manoeuvring in lightly cluttered naturally open corridors. EMF costs are source and quantity dependent, and feasible to institutions and grant beneficiaries. Elevated mist-net frame is a workable alternative or supplement to existing elevated mist-netting applying poles, ropes and pulleys, owing to strength and durability, replicable construction and versatile manoeuvrability in upper strata. The EMF design demonstrates favourable prospects for high-tech development, thus further innovations are recommended.