Empathy

So I am walking home and I see this bird lying on the ground, wounded and in pain. I feel bad for the poor bird since it is in pain and has severely damaged its wing. I now have 3 choices:

1. I ignore the bird and go on my merry way, forgetting all about it.
2. I take the bird home with me and nurse it to health, knowing that it will never fly again.
3. I put the bird out of its misery

As humans, is it okay to ignore a creature in peril simply because you don't know what to do? Or because you don't care? And would it be different if it was a hurt person instead of a bird? And what if I picked option number 2? Of course helping a fellow animal in peril would be the obvious choice for me, there is a con here! Though it will be relieved of its pain, it will never be able to fly again and thus I would deprive it of its natural trait. Birds can fly, and that's what they do if they need to survive, but here is the tricky question: Will the bird be unhappy? Are other animals even capable of thinking and feeling like we do? Would it just get used to not having that ability and then live the rest of its life like this, as happy and chippy as ever? Then there also is option 3: putting the bird out of its misery - and I do believe the ethics and that one speaks for themselves.

Anywho, this is a scenario I've yet to encounter. I merely read about it in Zetman and History's strongest Disciple Kenichi and happened to gain a cerain couriosity towards the topic. What would you do in this situation?