Dancer Jacqueline Manyaapelo reacts to the beast in “The Firebird” Monday night at the Sun Valley Summer Symphony. Composed by Igor Stravinsky for the 1910 Paris season of Sergei Diaghilev’s Ballets Russes, this performance was presented in collaboration with puppet designer Janni Younge of the Handspring Puppet Company of Cape Town, South Africa, and choreographed by Jay Pather. The Sun Valley Pavilion and lawn were filled to capacity for this original production that was commissioned together by several of the best summer symphony venues, including Wolf Trap, Los Angeles Philharmonic at Hollywood Bowl and Chicago Symphony Orchestra at Ravinia Festival.