The 2019 field crew of the Helmeted Woodpecker radio-tracking project with their field gear. Clockwise
from lower left: Brian Camacho, of the forest ranger school in San Pedro, who is doing his final
thesis with the Helmeted Woodpecker project; Juan Manuel Fernandez, of the Universidad Nacional de
Noreste in Corrientes on a CONICET scholarship, in his 4th year of a PhD with the Helmeted Woodpecker
project; Sebastian Pereira, lifelong resident of San Pedro with indispensable forest skills and tree
identification knowledge; and Martjan Lammertink, lead researcher. Field gear, clock wise from top
left, includes string for mistnets; a slingshot for shooting strings into high tree forks; mist nets
and Pesola spring scales; a Bluetooth speaker, a wooden box with sticks to imitate Robust Woodpecker
double knocks; a Tupperware box with radio transmitters; wooden decoys of Helmeted, Lineated and
Robust Woodpeckers, binoculars, gps units, head lamps and compasses; machetes; radiotracking antennas;
data sheets; an extendable pole with video camera and monitor for cavity inspections; a parabolic
microphone and sound recorder; camouflage netting; tripod, monopod and cameras.