Throughout history, animals have played a surprising role in the world of espionage. From the early days of strapping cameras to pigeons in the early twentieth century, to more recent attempts at using marine mammals, birds, and even insects, intelligence agencies have continually explored the potential of animal operatives. The Cold War saw a surge in these efforts, with projects ranging from American bat bombs to the infamous attempt to use cats as mobile listening devices.

In recent years, Russia has tested remote-controlled pigeons with brain implants, while China has developed mosquito-sized robotic spies. These efforts highlight both the creativity and ethical dilemmas of using animals or animal-like technology in intelligence gathering. Not all attempts have been successful or practical, as seen in the failed cat project and the capture of vultures and squirrels suspected of spying. Nonetheless, the ongoing 'animal arms race' underscores the lengths to which nations will go to gain an edge in intelligence, blending biology and technology in ever more inventive ways.