“…The level of hybridization we documented between M. baibacina and M. sibirica is lower than what has been reported in Palaearctic Spermophilus, both in the proportion of hybrids in populations and in spatial coverage (Ermakov et al, 2002(Ermakov et al, , 2015Titov et al, 2005;Spiridonova et al, 2006;Ivanova et al, 2017). But in general, hybridization occurs more frequently in secondary contact zones within Palaearctic Marmota and Spermophilus than Nearctic Marmotini (Hird et al, 2010;Stangl et al, 2012;Frare et al, 2017;Leitner et al, 2017).…”