1. The document provides instructions for an ecology lab where students estimate the population density of rare spotted beanies using quadrant sampling and mark-recapture techniques. 2. Students will work in groups of three to conduct trials of each method and record their results. They will then analyze the results and write a formal lab report. 3. The lab report requires sections on purpose, background, materials and procedures, calculations, results, and conclusions where students will analyze their results and discuss limitations and improvements.