Energy Efficiency

Losses in the owl is from respiration, producing energy for flight, digestion, movement, the nervous system. 

All organisms finally die and are broken down by micro-organisms living on the dead and decaying remains of other micro-organisms. 

100Kj of grass energy represents grass eaten by the herbivore. 

Mouse have to walk around and find their food and carry out the process of respiration. 

90Kj of energy left is lost from respiration and undigested food.