Yellow-margined Flatbill vs Grey-crowned Flatbill

In short

The Yellow-margined Flatbill and Grey-crowned Flatbill are both Amazonian flycatchers with overlapping ranges, making them challenging to distinguish. Key differences lie in their vocalizations and subtle plumage variations, particularly around the head and wings.

Identification tips

• Listen for vocalizations: Each species has distinct calls, despite variability.
• Check wing margins: Look for yellow margins on the Yellow-margined Flatbill.
• Observe crown color: The Grey-crowned Flatbill has a greyer crown.
• Consider location: While ranges overlap, the Grey-crowned Flatbill's presence in the Atlantic Forest can be a clue.
• Join mixed flocks: Both species often forage in mixed-species flocks, so observe behavior and associations.

Size

Both species are similar in size, typical of small flycatchers, with no significant size difference to aid identification.

Plumage

The Yellow-margined Flatbill typically shows a more pronounced yellow margin on the wings, while the Grey-crowned Flatbill has a greyer crown. These differences can be subtle and vary across subspecies.

Behaviour

Both species often join mixed-species flocks and forage at middle to upper levels of the forest, usually alone or in pairs.

Habitat

Both species inhabit a variety of forest types in Amazonia, generally below 1000 m. The Grey-crowned Flatbill also has a disjunct population in the Atlantic Forest of eastern Brazil.

Voice

Vocalizations are a key differentiator, with each species having distinct calls. However, these can be complex and variable, requiring careful listening.