The reason the scientists are calling it “hidden” is because they couldn’t find anything so they had to assume moths are being effected by “climate change.”
Via WUWT:
From the University of Michigan and the department of Mothra studies, comes this big let down. Even though moths are supposedly affected by climate change, “90 percent of them were either stable or increasing” while the climate where they lived warmed. But wait! Moth scientists know there MUST be an effect, so in contradiction to their observations, the moth scientists claim the climate change effects are now apparently “hidden”. Hopefully, those moths thriving under global warming doesn’t lead to giant moths:
Moth study suggests hidden climate change impacts
ANN ARBOR—A 32-year study of subarctic forest moths in Finnish Lapland suggests that scientists may be underestimating the impacts of climate change on animals and plants because much of the harm is hidden from view.
The study analyzed populations of 80 moth species and found that 90 percent of them were either stable or increasing throughout the study period, from 1978 to 2009. During that time, average annual temperatures at the study site rose 3.5 degrees Fahrenheit, and winter precipitation increased as well.
“You see it getting warmer, you see it getting wetter and you see that the moth populations are either staying the same or going up. So you might think, ‘Great. The moths like this warmer, wetter climate.’ But that’s not what’s happening,” said ecologist Mark Hunter of the University of Michigan.