The Dusky-capped Flycatcher is most similar to the other flycatchers in the genus Myiarchus: Great Crested, Brown-crested and Ash-throated. Great Crested and Brown-crested are larger with larger, thicker bills. Great Crested has a darker gray throat and breast. The Ash-throated has paler yellow underparts. Dusky-capped has a browner, less rusty tail than Great Crested and Ash-throated. The calls of these very similar species are an excellent way to distinguish them. Some species of kingbirds are similar but have paler heads and lack rusty in the tail.