well im stupid cause i cant answer this question can you?
the sun(even at total dark) gives energy to the water in the peak and evaporates
the bird moves
the water condensates giving back ALL THE INITIAL ENERGY and falls as rain
if the sun gives energy to the water but all the energy is given back to rain WITH WHAT ENERGY MOVES THE BIRD?
edit:
the bird is the BEST thermodinamic engine ever known, why?
it works with the lowest temperature difference between cold and hot focii
not sterling can do that no carnot can do that
the science world is manipulated you want proof:
my dad solved fermats theorem in an elemental manner(that is with fermats time maths)
no peer magazine is interested for not being of their interest even if correct
yet a respected online philosophical magazine gives him credit with being the 1st person after fermat who solved the problem FUNDAMENTALLY
http://symploke.trujaman.org/index.p...e=Pedro_Fermat
99% of the science world is endorsed by petrochemicals, what gain would they get if energy was got from giant dinky birds