Campo Troupial - Icterus jamacaii
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Mãe-da-lua
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Mammals

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in Itapajé, Ceará,
100 km from Fortaleza.
Presentation
Mammals

The avifauna is listed in
Birds of NE Brazil.
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Threatened species
Many species of NE Brazil are threatened by extinction. Our reserve helps to protect some of them:
Birds of NE Brazil
in Caatinga, Cerrado,
and other habitats
Brown-crested Flycatcher
Myiarchus tyrannulus
Maria-cavaleira-de-rabo-enferrujado
Family: Tyrannidae
Subfamily: Tyranninae

The local subspecies is Myiarchus tyrannulus bahiae. RPPN Mãe-da-lua.

Brown-crested Flycatcher (Myiarchus tyrannulus)
10/09/2005; Fazenda Canaã, Pentecoste, Ceará, Brazil. 200 mm f2.8 lens.

Figure 1. I identified this bird as M. tyrannulus, based on the rufous edgings of the primaries, the prominent wing-bars, and the bill color. See photo below for a detailed view of the head of this individual.

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Brown-crested Flycatcher (Myiarchus tyrannulus)
10/09/2005; Fazenda Canaã, Pentecoste, Ceará, Brazil. 200 mm f2.8 lens.

Figure 2. Details of head, from Myiarchus tyrannulus shown above. The bill of this bird is dark, with some pink at base of mandible. It is not possible to clearly see whether the pink extends to base of maxilla as well. In any event, the bill is not entirely dark or blackish; this is one of the characteristics that allow to differentiate between the Brown-crested Flycatcher and the (otherwise similar) Short-crested Flycatcher, which has an entirely black bill ( Ridgely and Tudor 1994).

However, there is some interindividual variation in bill color of the Brown-crested Flycatcher, even in the same population (i.e. same locality), and the Brown-crested can also have an all, or nearly all, dark bill. See this example. Thus, a bill with a pink base indicates a Brown-crested, but an all-black bill could belong to either a Brown-crested or a Short-crested Flycatcher.

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Brown-crested Flycatcher (Myiarchus tyrannulus)
05/05/2008; Mãe-da-lua reserve, Itapajé, Ceará, Brazil. 200 mm f2.8 lens.

Figure 3. The bill of this individual is nearly entirely black, only the base of the mandible appears a little lighter. Based on the vocalizations, I identified the individual as a Brown-crested Flycatcher. Compare with this photo to see interindividual variability.

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