Perhaps the bird’s calls could be less attracting and disorienting to predators and the ones with the said distinctive calls could have survived to repopulate and pass down the genes.
This answer should be correct
The adaptation that viceroy butterflies use is successful because it is so well adapted for the environment that it has evolved in.The ability of this butterfly to adapt to it environment has helped it survive in long term.But because the viceroy has been so successful it might also have come to a coast
Climate , topography , soil , disturbance
They can enter your blood stream (via breathing/ingesting) and once in your bloodstream they can enter cells and mutate your dna, which can cause cancer/birth defects/ reproductive harm
The majority of the accessible drinking water on our planet comes from glaciers.
