Parasite, zombie, leech—these words are often used to describe people in unkind ways. Many of us recoil when ticks, tapeworms ...
A rare breed of blood-sucking leech is being bred at London Zoo in a bid to save the UK’s largest native leech species from extinction. The medicinal leech was once widespread in Britain ...
The medicinal leech is the UK's largest leech species and can grow to up to 20cm (8in) long. They have five pairs of eyes and a sucker containing ... the removal of blood in the belief it would ...