Let's start by you informing us as to how much of your money we can spend, Maria.
The best of the 'bridge cameras' can take reasonable macro shots under good conditions and for a realistic price. However, if you want to go down the very best quality route with Dslr cameras and lenses you could expect to pay somewhere around £1,000 for a camera body and the same for each lens.
But this is somewhat variable depending on many factors so could be a little less; or more!
I know people who attach cameras to telescopes for serious bird photography but this is a specialised, and expensive, pastime.