in roofs and eaves of buildings using mud and saliva.
mud and saliva
What's the awnser
instinct
What's the awnser
Swallow's Nest was created in 1912.
A nest? A nest? A nest?
The pebbles are collected to build a nest.
After you knock down a swallow's nest, the birds may attempt to rebuild it in the same location or nearby, as they often return to their nesting sites. However, if the disturbance is frequent or the nesting materials are removed, they might abandon the area and seek a new location to build their nest. Swallows are determined but can also be sensitive to repeated disruptions.
cliff swallow
crow yes build nest
penguins build their nest in summer
no