Friday, May 7, 1999 Published at 14:13 GMT 15:13 UK
Black rat back in the UK
The black rat is a cousin of the more common "sewer rat"
The black rat, Rattus rattus, is believed to have made a comeback in the UK after one was found under a woman's fridge in Cornwall.
The black rat, also known as the old English rat or ships' rat, was the only rat in England until the 18th century, when it was ousted by its aggressive cousin, the brown rat.
Mr Rickard said: "I didn't believe the lady (who called me out) when she said they were black rats because I had never seen one, but when I saw them I knew what they were.
"The latest one was under a fridge. I got it and killed it and brought it back to the office and we took measurements of it. It was definitely 100% a black rat.
"It looks completely different. I call it the model rat. It is slim, the feet and skull are different and the fur is like velvet.
Black rats are notorious for carrying fleas, which are widely thought to have been responsible for bringing bubonic plague to Britain.
"We did check it for fleas", said Mr Rickard, " but there weren't any."
No need for alarm
"I've been catching rats for 20 years and I'm just pleased to have seen a black rat because they aren't supposed to be here," Mr Rickard said. "You only find them in a couple of places in the country at docks."
"The skull was damaged but as far as I can tell there is a high probability it was a black rat," she said.
Mr Rickard said the rats could breed quickly and it was likely there were more of them.
"I do believe in all probability there are more of them because this one was five miles inland," he said.
Experts and officials have stressed the risk of plague today is negligible and the public should not be alarmed.