DARPA spy-bugs

DARPA spy-bugs are mostly flying insects,
and much-less-commonly ground bugs (insects, spiders, etcetera),
which contain delicately-implanted microelectronics,
which guide the bugs' movement (via brain electrodes) when their operator so-desires,
and which contain micro-cameras and micro-transmitters.
They are so-named becuz they were developed by DARPA-
Defense Advanced Research Projects Agency.
They have been made available to some U.S. intelligence agencies.

The implantation of the microelectronics is obviously not done by hand,
but requires advanced precision machinery.
The bugs also incorporate non-metallic conductors for some roles.

The cameras attain adequate resolution, despite their minute size,
via using a very small vision-field of adequate resolution
(the larger the vision-field, the larger the needed camera),
whereas a low-resolution broad-field camera is used for general navigation.