A.S.
Hi A.,
I've been to both Yosemite and Yellowstone and both are beautiful. However I can confidently say that you are more likely to see an eagle at Yellowstone than you are in Yosemite. I've been to Yosemite many times (my mother lives 16 miles outside of the south entrance) and Yellowstone only once. In all the times I've been to Yosemite I've never seen an eagle but the one time I went to Yellowstone I got to see a nest with babies and two adults. Where you want to stay will depend on what entrance you are at and what time of year you go. You can go to the following website www://nps.gov/yell and it will take you to the National Park Services website for Yellowstone. You can also find Yosemite on the nps.gov website. Good luck and I hope you have a great time whichever trip you decide to take!