This is the 572nd most frequent Hebrew word.
אליהם
"To them" or "towards them."
Here, 'אליהם' denotes moving towards the birds, emphasizing direction and movement.
הילדים ראו ציפורים ועפו אליהם.
The children saw the birds and flew to them.
In this sentence, 'אליהם' is used to indicate the direction of the letter being sent towards a group of people.
שלחתי אליהם מכתב עם הפרטים.
I sent them a letter with the details.
In this context, 'אליהם' describes addressing or directing one's speech towards a group of people.