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Swallow Under a Canal Bridge

Beneath a stone canal bridge near a water lock, a swallow perches near its mud nest on a crisp spring morning.

A large swallow rests beside its nest beneath a stone canal bridge, with a lock and water visible beyond.
Swallow Under a Canal Bridge
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Nesting Swallows by the Canal Lock

A swallow builds its home under the arch of a stone canal bridge, resting right next to its nest above flowing water and a navigation lock.

The Nesting Habits of Bridge Swallows

Swallows frequently construct nests on sheltered man-made structures like stone bridges, barn eaves, and canal locks because these locations offer protection from rain and predators. They construct mud nests by collecting tiny pellets of wet soil in their beaks and mixing them with grass fibers. Canals provide ideal insect hunting grounds for swallows flying low over water surfaces.

Natural Colors of Swallows and Canals

  • Swallow back feathers: glossy dark steel blue
  • Swallow throat patch: chestnut red or warm reddish orange
  • Swallow underbelly: creamy off-white or pale buff
  • Stone canal bridge: textured gray granite or brown sandstone
  • Mud nest: dark brown dried clay earth
Questions and answers

Swallow Nesting Questions and Answers

How do swallows build nests out of mud?
Swallows gather mud pellets from puddle edges using their beaks, blending the soil with saliva and plant stems to create durable cup-shaped nests on stone walls.
Why do swallows prefer nesting near water like canals?
Water bodies attract abundant flying insects such as midges and mosquitoes, providing an ample food source for parent swallows and their chicks.
What is the function of a canal lock?
A canal lock is a water chamber with gates that raises or lowers boats between different water levels along a river or artificial waterway.
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