Birds are one of the most abundant taxa that are seen to share our urban spaces. Simultaneously, as all other living things birds are also responding to changes in their environment caused due to climate change. 
For my PhD, I was interested in understanding how birds are responding to the interaction of landuse and climate change. To explore this questions for two of the chapters of my thesis I used long-term citizen science data. And for the other two chapters I collected field data on bird-plant interactions in two different cities, Helsinki and Bengaluru.
Using the long-term ecological monitoring data I was able to show that changes in snow cover affected the abundances of over-wintering birds in Finland more so than temperature. As snow covers decrease with warming climates, there will be more birds in farmland habitats in Finland. Similarly, we also showed that the poleward shifts of birds in response to climate change are likely to happen further in farmland habitats as compared to forests, urban settlements and rural settlements.
Studying bird-plant interactions in Bengaluru, I showed that avian pollinators are more likely to pollinate native trees and steal nectar from alien species, hence harming their seed set. 
Finally, in Helsinki we are seeing that frugivorous birds are more likely to disperse the seeds of native plant species, but this is probably driven by the huge amount of fruits on two native plants in the city.