House finches and blackcapped chickadee (IMAGE) American Society of Tropical Medicine & Hygiene Caption House finches and blackcapped chickadee visiting a bird feeder equipped with a radio frequency identification (RFID) reader. We monitored birdfeeder usage of common backyard birds with RFID tagging to inform our predictions of the impact of bird-delivered ivermectin on West NIle virus transmission. Credit Nick Komar Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.