Maybe one of these positions so it's not too cliche?
Traditional Swallow (sketch tattoo)
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I have a t-shirt design based on this traditional swallow tattoo.
Swallow tattoo on hand - 50 Lovely Swallow Tattoos | Art and Design
Final product image Más
Swallow tattoo set vector 586947 by paul_june
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20 Best Swallow Tattoo Design | Best Tattoo Ideas
Very cute. Sparrows have a beautiful meaning. Like the lock and key incorporated. Would put on my back instead