These are acrylic swallow or hummingbird dangle earrings. They feature whimsical, colorful bird motifs crafted from durable, lightweight acrylic material, often designed to mimic vintage tattoo styles. 
Product Information
Design: Swallow or hummingbird bird shape with colorful detailing in shades of pink, yellow, blue, and black.
Material: Acrylic, which makes them lightweight and comfortable for all-day wear.
Style: Dangle earrings, popular as statement pieces or for vacation attire.