Espers is a neo-psychedelic folk band from Philadelphia. They formed in 2002 as a trio of singer-songwriter Greg Weeks, Meg Baird and Brooke Sietinsons but later expanded to a sextet including Otto Hauser, Helena Espvall and Chris Smith. Their music is reminiscent of late-sixties british folk such as that of Fairport Convention, The Pentangle and The Incredible String Band as well as many contemporary folk acts such as Six Organs of Admittance, Marissa Nadler and Nick Castro and as such their work is often lumped in with the so-called new weird america movement or naturalismo as Devendra Banhart preferred to coin it in 2006. Most of the band's members have also featured on recordings by a number of other folk artists, old and new, such as Nick Castro and Vashti Bunyan and as a result have become an important part of the psych-folk revival.

They released their self-titled debut, Espers, in 2004 to much acclaim and followed that with an album of cover songs, The Weed Tree, in 2005. This release featured the band's versions of songs by artists as diverse as Nico, The Durutti Column and Blue Öyster Cult. In 2006 the band released their third full-length Espers II on Drag City Records.