Micrófono Parabólico BirdMic para la escucha de aves. Ligero y multifuncional. Acopla una grabadora de campo un smartphone. Ideal para videocámaras.
www.birdfox.tech
They are based in Spain and ship anywhere, including the USA. A parabolic dish will increase the sound reaching the mic and no signal amplification needed. They sell a kit that has the parabolic dish, microphone, and connectors for smartphones.
I have tried very good self-powered shotgun microphones and they did not improve the sound recording or bird song detection with Merlin one bit.