In Costa Rica, the Long-tailed Silky-flycatcher occurs in montane woods and partly open areas. It pairs to breed and spends much of the rest of the year moving in dispersed flocks.
In the Costa Rican account, the male has a pointed crest and stepped tail, with elongated central feathers. Its eye-ring is bright yellow.
In Costa Rica's mountains it uses wooded and partly open areas. Pairs form to breed, while for much of the rest of the year birds move in dispersed flocks.
In Costa Rica, it builds a broad, shallow cup nest mainly from tightly compacted grey-green lichens.
An extinction-risk assessment has not been added yet.