Just got to watch a goldfinch perched atop our lone 3+ foot sunflower (out in our small lawn) feed another goldfinch that was singing the "Feed me! Feed me please!" calls. I can still hear the one that was fed chirping off in the distance to its friend/parent/other goldfinch.
Whoever supposed that nature was solely about survival of the self didn't get to watch these guys. They're willingness to express compassion is clearly there - and beautiful to behold~