SAMPLES ARE CURRENTLY UNAVAILABLE. Please contact the NEON Biorepository for information about when these samples will become available. This collection contains small mammals collected as bycatch during ground beetle sampling and pooled across multiple traps within a plot (NEON sample class: bet_archivepooling_in.subsampleID.mam). Ground beetles are sampled using pitfall traps (16 oz deli containers filled with 150 or 250 mL of propylene glycol). Multiple traps are deployed in each of 10 plots at each terrestrial NEON site (up to 4 traps per plot; maximum 40 traps per site), with traps arrayed approximately 20 meters from the center of the plot in each of the four cardinal directions. Sampling occurs biweekly throughout the growing season (when temperatures are above 4 degrees C). Vertebrate bycatch is stored in 95% ethanol and archived in a temperature (17-18°C) and humidity controlled environment. See related links below for protocols and NEON related data products.