A study by the bird biologist Peter Rock, Europe's leading authority on urban gulls, into the rise of herring gulls and lesser black-backed gulls in Bristol has discovered that in 20 years the city's colony has grown from about 100 pairs to more than 1,200.
rock | Rock music | rock music | punk rock | alternative rock | Peter Pan | indie rock | Peter Gabriel | Peter Jackson | rock and roll | Peter | Saint Peter | Peter Paul Rubens | Punk rock | Peter Sellers | rock band | Peter the Great | Blue Peter | Rock Band | 3rd Rock from the Sun | Kid Rock | 30 Rock | Peter Frampton | Peter Greenaway | Peter Brook | Rock | pop rock | folk rock | Little Rock, Arkansas | Indie rock |