“…This pattern belies the difficulty of obtaining high quality DNA for many species, the greater availability of specimens that may have lower quality DNA, and the untapped potential of these samples to address key questions in ecology and evolution. Tremendous biological insight can be gained from specimens which may have degraded DNA due to environmental or storage conditions including road-killed specimens (Rusterholz, Ursenbacher, Coray, Weibel, & Baur, 2015;Say, Devillard, Léger, Pontier, & Ruette, 2012), shed substances including feces, feathers, or fur (Alda et al, 2013;Hans et al, 2015;Waits & Paetkau, 2005), as well as museum and herbarium specimens (Beck & Semple, 2015;Gilbert, Moore, Melchior, & Worobey, 2007;Sproul & Maddison, 2017). Recent work on ancient specimens has revealed great potential for NGS with very limited amounts of highly degraded DNA (Heintzman et al, 2015;Knapp & Hofreiter, 2010;Kosintsev et al, 2018), although most ancient studies focus on large vertebrate taxa (but see Heintzman, Elias, Moore, Paszkiewicz, & Barnes, 2014).…”