We observed dusky-legged guans moving through the canopy and roosting on thin branches to feed on fruits, or walking on the ground of the forest where they could find fallen fruits (see Figure 1a and Table 1).
7) (see Figure 2a), and the frequency of dusky-legged guans by km was higher in the Base area (6.
Dusky-legged guans present in the DAE fed on 10 native species of fruits, while in the Base, only two, although the same fruit plants occur in both areas (see Table 2).
At the Base we found a remarkable concentration of dusky-legged guans feces on the ground below perches, where the soil is compacted and regularly weeded, hindering germination and preventing the establishment of seedlings.
According to Joao Vasconcellos-Neto (unpublished data), the clustering of guans around the Base started after 1992, apparently due to the supply of food by humans, and reached 76 individuals around the base at some point.
The species are: Speckled chachalaca (Ortalis guttata), Spix's guan (Penelope jacquacu), Blue-throated piping-guan (Pipilecumanensis), and Razor-billed curassow (Mitu tuberosum).
Densities for the piping-guan in Maderyja and the Spix's guan in Maderyja and CFA were more or less similar when considering individuals, ranging 4.
The encounter rate for the Spix's guan in CFA and the razor-billed curassow in Maderyja were highest with 2.
The encounter rate found for Spix's guan in CFA (2.
The density of Spix's guan is lower in Maderyja (4.
We recorded a single picture of the Crested Guan on May 18 2008, at 1960 masl, in oak forest (21[degrees]24'53.
Near Guanajuato, in the state of San Luis Potosi, the Crested Guan was observed in the locality of San Nicolas de los Montes in the municipality Tamasopo (Vargas 2006; Fig 1) and the community of San Rafael in the municipality of Xilitla (Juarez 2008; Fig 1).
The Crested Guan has been documented to be an effective seed disperser, with 50% of the seeds dispersed moved > 40 m from the parental plant (Howe 1993).