Hello,

This is my solution for C#, quite easy to understand:

class Solution {

        // Complete the migratoryBirds function below.
        static int migratoryBirds(int[] ar) {

                int[] sightings = new int[]{0,0,0,0,0};

                for(int x=0; x<ar.Length; x++)
                {
                        sightings[(ar[x]) - 1] = sightings [(ar[x] - 1)] + 1;
                }

                int indexOfMaxValue = 0;
                 for (int x=0; x<sightings.Length; x++)
                {
                        if (sightings[x] > sightings[indexOfMaxValue])
                        {
                                indexOfMaxValue = x;
                        }
                 }
                return indexOfMaxValue + 1;

        }