Reporter of Burdock element transposition. Contains a complete copy of the Burdock retrotransposon (flanked by P-element ends) with an EGFP cassette inserted in the antisense direction in the non-coding sequence of Burdock. The EGFP sequence contains a disruptive intron that can be spliced during transcription of the retrotransposon, but not during transcription of EGFP. Thus, EGFP protein is only expressed after mobilization of the Burdock element in the reporter transgene, which generates a new copy of Burdock containing EGFP without the disrupting intron.