Nice idea. Start with a low‑power microcontroller, like an ESP32‑S2, and use deep sleep to cut energy. Put a thin solar panel on the casing and a supercapacitor for buffering. For the sensor, an infrared camera or a small acoustic array can detect birds without disturbing them. Keep the data packet size minimal; send it over LoRa or NB‑IoT to reduce power. Design the enclosure from recycled PET and use a biodegradable sealant so the device is almost invisible to the environment. Just make sure the firmware is modular—so you can swap out sensor modules later. That’ll keep the system efficient and eco‑friendly.