WHAT does a swallow nest look like?

A swallow nest is typically a small, cup-shaped structure made from mud, grass, and feathers. It is often found under eaves, in barns, or on cliffs, and has an open entrance at the front. The nest usually has a rough, textured surface and is relatively shallow, providing a cozy space for the eggs and chicks. Swallows often reuse and refurbish their nests each breeding season.