That's a difficult question to answer because many jobs which are suitable for zoologists are not simply titled "zoologist". There are many different job titles suitable for a zoologist with relevant experience to that specific job, such as "research assistant" or "field assistant". It's very competitive and the pay is often low - many charities will have vacancies for those willing to work full-time (40 hours + per week) for an extended length of time (several months) for free (sometimes not providing accommodation or food in return for work). The good thing is that a degree in zoology can provide you with a wide range of experience, including ecological survey experience and research experience in the field and lab.