In article , A.Malhotra
writes
In most garden ponds thats still enough to wipe out the year's production
of newts. In the wild newts are hardly ever found in ponds which have
sticklebacks. That not to say you might not choose to have sticklebacks
rather than newts in your wildlife pond but you are unlikely to be able to
have both.

But are you sure it's that way around? We started out with lots of
sticklebacks, lots of frogs and two newts. Two years down the line we
have one stickleback, lots of frogs, and 40 newts.

--
Kay Easton

Edward's earthworm page:
http://www.scarboro.demon.co.uk/edward/index.htm