Here are some super cute and creative nursery ideas and accessories to follow this theme:
This mom draped burlap from the ceiling to give the appearance of a tent. She also painted the mural herself using patterns. Click on the "source" link below for how-to's on projects in this nursery:
I love the modern wall art in this nursery... this would be a really fun DIY project!
In the above nursery, I love the way the artist incorporated the animals into the letters of the baby's name!
These large 3D wall stickers are wonderful! Gives the feel of a mural but takes a lot less time:
I came across this bedding and love it for this theme! The animals' eyes are absolutely adorable.
These bookends would also look great in a zoo-themed room:
Search Amazon.com for zoo nursery decor