I'm really sorry about your losses.
I like butterflies and moths at all life stages. A lot of people don't care for caterpillars much, especially when they eat their plants, but I think that, when everything is in balance, it's fine. If there are more caterpillars, there will be more of the birds that eat them, etc.
Once they turn into butterflies or moths, they can be quite fascinating and even personable...sitting on your finger, and eating fruit treats that you give them...if they eat at that life-stage.
Snakes are hit by cars too often. I think that, besides roads being a bad place for them, they hang out too long because they are warm, and they like the warmth.
How nice that you took him back into your yard.
I am so happy that you used a rake to lift your poor squirrel. My first thought, guiltily, was you, and what killed your sweet little friend.
That must have been quite a shock. I hope that the other one will continue to frequent your tree, so that you will have many more hours of peaceful joy watching him/her.
Love All Life, Thank You For Posting! :)