葡萄牙采购需求：动物迁徙、动物行为、野生动物 GPS 追踪器、动物运动、节律行为、反向定位

I'm looking for some guidance on the most suitable transmitters for tracking migratory shrikes, particularly those belonging to the Lanius species. Given their unique behaviors and habitats, I need transmitters that can handle varying conditions while providing reliable data. Could you provide information on the key features and specifications I should consider when selecting these transmitters? Also, any recommendations on specific models known for their effectiveness in similar fieldwork would be greatly appreciated. I'm eager to explore the best options available for an optimal migration tracking setup. Thanks!