Being involved in breeding programmes was great, I got to interact with some very rare species up close, and see some big success stories in animal breeding. (sorry AN was trying to put in a quote so this post made more sense but it is late and I can't seem to get it too work :-// ) It is unfortunate that I am no longer involved in that capacity.
It depends in what way you want to help, because little things make a huge difference. I am a bit of a chicken activist (bet you couldn't guess that) so I will start there. I disagree with intensive farming practices in this country, it results in the unnecessary suffering of an animal, by modifying the way you purchase your food you can make a huge difference, ie free range eggs means a chicken gets to live and behave in it's natural way and this vastly improves there quality of life. I'm very big on chickens as I have three of my own and they are fantastic creatures that are really underrated.
I am particularly big on animals so on a local basis I have re homed a number of more unusual critters that are normally viewed as undesirable, and would struggle to be re homed. My current project is badgering my husband insistently to agree to re home a dog (or three!)
From the save the endangered species perspective, support charities in the UK (including zoo's whatever you may think of them if it weren't for zoo's firstly we wouldn't know about these animals and secondly a lot of the species would no longer be here without them). And support for these groups can vary depending on who you are dealing with, the obvious is financial but also a lot will take volunteers. Also whilst travelling abroad if you see tourist attractions that you feel are unethical, don't give them your money this merely perpetuates the problem.
As for global politics I have no idea I stick with the animals they are less complicated!!!!
Hope the info is useful. And yes I am a veggie!!
I am nothing