This collection contains vials of identified mosquitoes stored in bulk (not pathogen tested) from CO2 trapping at terrestrial sites (NEON sample class: mos_archivepooling_in.archiveVialIDList). When adult mosquitoes are active, sampling occurs (via CDC light traps) every two weeks at core sites and every four weeks at relocatable sites. A sampling bout consists of one trapping night and the following day for up to ten plots per site. Following collection, samples are sent to a professional taxonomist where a subsample of each catch generated from each trap is identified to species and sex. Vials containing identified mosquitoes are archived in 2, 5, 10, or 15 mL cryovials in liquid nitrogen, or at -80 for samples collected before 2020. See related links below for protocols and NEON related data products.