Fruit Bats (band) Bats had begun to evolve into a band with the inclusion of I Rowboat members Dan Strack and Brian Belval and in 2001, their debut record Echolocation was released on Califone's imprint, Perishable Records. Tours followed with the likes of Modest Mouse and The Shins. Fruit Bats signed with Sub Pop in 2002 and have released four albums with the label including "Mouthfuls" in 2003, "Spelled in Bones" in 2005, "The Ruminant Band" in 2009 and "Tripper" in 2011. Johnson also joined The Shins in 2009. Their song "Humbug Mountain Song" spurred new fan activity. In an interview with "Reverb
Animal echolocation Their high intensity calls are necessary to even have moderate detection of surroundings because air has a high absorption of ultrasound and because insects’ size only provide a small target for sound reflection. Additionally, the so-called "whispering bats" have adapted low-amplitude echolocation so that their prey, moths, which are able to hear echolocation calls, are less able to detect and avoid an oncoming bat. Calls can be composed of one frequency or multiple frequencies comprising a harmonic series. In the latter case, the call is usually dominated by a certain harmonic ("dominant" frequencies are those present at higher intensities than