LINQ - UNION Select/Combine elements from different arrays

Say I have 2 string arrays.

string[] animals = new string[5] { "Ape", "Ant", "Dog", "Cat", "Elephant" };
string[] birds = new string[5] { "Auk", "Brant", "Catbird", "Cuckoo", "Cygnet" };

Now I want to select the animals and birds starts with letter 'A'
Here you go for the sample.

namespace My_Samples
{
    using System;
    using System.Linq;

    class Program
    {
        static void Main(string[] args)
        {
            string[] animals = new string[5] { "Ape", "Ant", "Dog", "Cat", "Elephant" };
            string[] birds = new string[5] { "Auk", "Brant", "Catbird", "Cuckoo", "Cygnet" };

            var result = (from a in animals
                         where a[0].Equals('A')
                         select a)
                         .Union(from b in birds
                                    where b[0].Equals('A')
                                    select b);

            foreach (string s in result)
            {
                Console.WriteLine(s);
            }

            Console.ReadLine();
        }
    }
}