Phenology is the study of Spring. In particular, it’s the recording and study of the first appearance of birds, animals, insects and plants in the spring. When things appear is affected by the climate, and so by studying if/how the first appearances have changed over time, we can see if current climate change is having an effect on wildlife. When things appear is important; lots of organisms are interdependent. For example, if warmer temperatures mean that birds appear earlier, but their food source hasn’t emerged, then they may not find food. These changes can affect lots of different organisms.