![]() In some rare situations, losing a bird species is inevitable.The toxic poisoning makes the bird infertile or even fatal. For example, man-made contamination in the ocean bed gets into the fish diet, which is then consumed by seabirds. ![]() Another reason is Biological Magnification (i.e., chemical toxins travel from the lowest chain species in the ecological pyramids to top of the chain). ![]() This, in turn, alters the hormonal balance in the birds and results in weak eggs which cannot survive too long. The concentrated pesticides on the field get stuck on the grains birds consume.
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