Blacklegged Tick Lifecycle (image) Cary Institute of Ecosystem Studies Caption Ticks take three blood meals during their lifecycle, as larvae, nymphs, and adults. Credit Leslie Tumblety, Cary Institute of Ecosystem Studies Usage Restrictions May be used to promote this press release. 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.