def migratoryBirds(arr):
    # Write your code here
    d ={}
    for i in arr:
        if i in d.keys():
            d[i]+=1
        else:
            d[i]=1
    maxval = 0
    minkey = 0
    for key,value in d.items():
        if value>maxval:
            maxval=value
            minkey=key
        elif value==maxval:
            if key<minkey:
                minkey=key
    return minkey