Tracklist front / back album covers
"El universo sobre mí" — #1 (SP)[2] (#5 (MX) (The Universe Over Me)
"Días de verano" — #1 (SP)[3] #24 (MX) (Summer Days)
"Revolución" — #5* (SP) (Revolution)
"Mi alma perdida" (My Lost Soul)
"Marta, Sebas, Guille y los demás" — #1 (SP)[4] #20 (MX) (Marta, Sebas, Guille and the Others)
"Esta madrugada" (This Early Morning)
"Big Bang" (Big Bang)
"Enamorada" (In Love)
"Tarde para cambiar" (Late to Change)
"En el río" (By the River)
"Resurrección" — #1 (SP)[5] (Resurrection)
"Confiar en alguien" (To Trust In Somebody)
"Salta" (Jump)
"No soy como tú" (I'm Not Like You) (ft. Enrique Morente)
Mexican bonus track
15. "Si Tú No Vuelves" — #1 (MEX), #3* (ARG), #31* (Ibero America) (If You Don't Come Back)
Pájaros en la cabeza (English: Featherbrain or literally, Birds in the head) is the 4th studio album by the Spanish folk rock group Amaral released in Spain during 2005, that same year the album received their second nomination for a Latin Grammy Award for Best Pop Album by a Duo or Group with Vocal, and it was the best selling domestic album of that year in Spain.