After completing B.Sc (H) Zoology you can apply for the higher studies. There are numerous higher study options for graduates in B.Sc. Zoology. Following are some suitable courses available for you:

Master of Science in Zoology
Master of Science in Applied Zoology
Master of Science in Zoology (Honors)
Master of Philosophy in Zoology
Master of Philosophy in Life Science
Doctor of Philosophy in Zoology
Master of Science and Master of Philosophy in Zoology
Post Graduate Diploma in Life Science
Doctor of Philosophy in Life Science
Master of Business Administration
Post Graduate Diploma in Life Science