threadtail

A threadtail is a common name that can refer to several different species of birds, typically belonging to the ovenbird family (Furnariidae). The most well-known bird commonly called a threadtail is the Rufous-tailed Leaf-eater (Philydor ruficauda). These birds are found in Central and South America, inhabiting forests and woodlands.

Threadtails are characterized by their relatively long, narrow tails, which often appear somewhat frayed or "thread-like" at the tips, giving them their name. Their plumage is generally drab, with shades of brown, olive, and rufous being common. They often have a distinctive pale supercilium, a stripe above the eye.

These birds are primarily insectivores, foraging in the understory and mid-story of forests. They are often seen gleaning insects from leaves, bark, and branches. Their behavior can be somewhat secretive, and they are often detected by their characteristic calls.

Another bird sometimes referred to as a threadtail is the Scaly-throated Leaf-eater (Anabazenops subalaris), which shares some similarities in appearance and foraging habits. The specific species meant by "threadtail" can vary regionally, but it generally points to a small to medium-sized furnariid with a noticeably tapered tail. Their nesting habits often involve building complex, cupped nests from plant materials, usually in concealed locations.