What ingredients do birds use to build nests?

What ingredients do birds use to build nests?

• A. Sticks, feathers, twigs, moss, and other materials
• B. Leaves and berries
• C. Sand and pebbles
• D. Wax and resin

Answer: (A)

Birds build nests from a mix of flexible plant materials and other readily available resources that can be woven together and cushioned for insulation and egg protection. Structural pieces like sticks and twigs form the frame, while softer items such as moss, grasses, leaves, and feathers line the nest to provide warmth and cushioning. Some birds also use additional binders or lining materials, and in some species saliva or spider silk helps hold pieces together. The option that lists a broad range of these nest-building ingredients best captures how nests are actually made. Leaves and berries, sand and pebbles, or wax and resin don’t represent the typical primary materials birds rely on for nest construction.