This project deals with the exploration of the possibility to use control theory tools for the design of vibrational piezoelectric energy harvesters (vPEH) devoted to supply tracking devices in migratory birds. The proposed explored techniques, radically different and scientifically novel relative to existing design methods of vPEH, will provide four major advantages: i) giving methodological designs, ii) pushing the actual limitation on power density, iii) introducing robustness for the harvested energy over a frequency variation of the ambient vibrations, iv) and permitting the substantial increase of their autonomy. The impact of the resulting vPEH to birds tracking are evident: volume and weight radically small allowing to equip more species of birds while than the actual possibility, devices autonomy extremely high (calculated for the bird entire life), and safety and harmlessness for the equipped animal thanks to the reduced sizes and weights.