I went to Spain in September and took the XC 50-230mm with me. I did not use it that much, but I had a chance to take it to the Bioparc in Valencia to give it a good try. Great lens! Also, when people look at you using it, they all comment: "look at the size of that lens!" haha it does get pretty big when at 230mm.
Here are some of my favorites, and in the end the link to the album in flickr with all of the images.
Suricato. Bioparc Valencia. Spain by Marcelo Valente, on Flickr
Giraffe. Bioparc Valencia. Spain by Marcelo Valente, on Flickr
Bioparc Valencia. Spain by Marcelo Valente, on Flickr
Chipanzee. Bioparc Valencia. Spain by Marcelo Valente, on Flickr
Chipanzee. Bioparc Valencia. Spain by Marcelo Valente, on Flickr
Bioparc Valencia. Spain by Marcelo Valente, on Flickr
https://flic.kr/s/aHskoNGFs1