98% of all animal deaths at the hands of humans are because of the meat (including seafood) and dairy industries.
The other 2% is things like hunting, clothing, horse racing, "entertainment" and so on...
I'm not saying the animals involved in the 2% are any less important, but in terms of sheer numbers if you can help someone stop eating animal products then around 196 animals a year are saved from death.
If one moronic redcoat on horseback is stopped from being involved in a hunt then another 30 or so morons will continue - whether it is illegal or not.
Vegans try to achieve 100%.
Here is a page about the 2%
Fur, leather, wool, silk and other murder