By convention
Wind energy, that derives from solar energy.
Chlamydia derives energy from the ATP of the host cell.
No specific cell derives solely energy from ATP. All cells consume ATP by energy-requiring processes which are endothermic. ATP is the main source of energy for all cellular functions.
decomposers
It derives from the forces within the nucleus
Birds have higher body temperatures then most mammals and because of this use a lot of energy. Maintaining body temperatures and flight are to things that birds do that require energy.
Birds need lot of energy because flying uses a lot of energy.
The sun. In fact nearly all useable energy on Earth derives eventually from the Sun.
Cellular respiration
they store up on energy when their not migrating, so that they can burn off that energy so the moral is birds are extrordinary
decomposers