In a seminal paper published in the scientific journal "Genetica" in 2001, it was shown that evolution that had taken place in this colonizing population of "J. haematoloma" on the Flamegold in a period of only a few decades. They showed that the beak length, which in the ancestral type was about 70% the length of the body, was only about 50% the body length in the insects that had colonized the non-native tree, though the size of the bugs themselves had not changed. In addition, they found that: