Pests aggressively attack corn seeds and plants in panaji, goa

When pests like crows, sparrows, pigeons, squirrels realize that seeds are being sown on the terrace garden in panaji, goa , they are eating almost all the seeds and no seeds are germinating.
The problem is particularly severe for corn seeds. Initially the domain investor had planted corn seeds repeatedly , however they disappeared without any trace at all.
So the domain investor decided to grow the corn seeds in a plastic container kept inside the house.
The corn seeds germinated, and were then transplanted to a terrace garden.
However the next day, the corn seedlings were damaged, the roots with the corn seed had disappeared
So the next time, the seeds were grown in a plastic bottle, and the domain investor waited till the corn plant was fairly large before moving it to the terrace
She also covered the roots of the plant with cocopeat.
All this did not help, the next day, the corn plants were selectively targetted by the pests in panaji, goa, again the root portion was selectively chopped off, another plant in the same pot survived the attack