What materials are primarily used for the fine interior lining of the nest?
Answer
Animal hair or fine grasses, often bound with spider silk
The interior lining of the nest is made of exceptionally fine materials such as animal hair or fine grasses, often given elasticity by being bound together with spider silk.

Related Questions
Which foraging technique involves darting from a stationary perch to intercept flying prey?What describes the typical territorial song delivered by the male Canada Warbler?Where is the Canada Warbler's nest typically situated relative to the ground?What consistent physical behavior is frequently noted when the Canada Warbler is perched or moving?What constitutes the primary food source for the Canada Warbler?What materials are primarily used for the fine interior lining of the nest?What is the defining characteristic of the Canada Warbler's breeding habitat?To which geographical regions do Canada Warblers travel for their wintering grounds?What potential function might the persistent tail movement serve while foraging in dense areas?Who shares the responsibility of provisioning the nestlings after hatching?