| Channel-billed toucan | |
|---|---|
 | |
| R. v. vitellinus atMatsue Vogel Park, Japan | |
Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Piciformes |
| Family: | Ramphastidae |
| Genus: | Ramphastos |
| Species: | R. vitellinus |
| Binomial name | |
| Ramphastos vitellinus Lichtenstein, MHC, 1823 | |
| Subspecies | |
See text | |
The channel-billed toucan (Ramphastos vitellinus) is anear-passerinebird in the familyRamphastidae found on theCaribbean island ofTrinidad and in tropical South America as far south as southern Brazil and central Bolivia.
Threesubspecies are recognized:[3]
| Image | Subspecies | Distribution |
|---|---|---|
 | Yellow-ridged toucan (R. v. culminatus) -(Gould, 1833): Originally described as a separate species. | UpperAmazonia from western Venezuela to northern Bolivia |
 | R. v. vitellinus -Lichtenstein, 1823 | Venezuela, the Guianas, northern Brazil and Trinidad |
 | Ariel toucan (R. v. ariel) -Vigors, 1826: Originally described as a separate species. | Central and eastern Brazil south of the Amazon River |
These subspecies were previously considered separate species, but all three, along with thecitron-throated toucan, will interbreed freely wherever they meet. However, the subspeciesR. v. ariel is closer toR. v. culminatus than to the nominate, and are by some already considered close to distinct species status. AsR. v. ariel was described beforeR. v. culminatus, if separated they would becomeRamphastos ariel ariel andR. a. culminatus. There also exists an isolated population in eastern Brazil. It looks very similar to, and has traditionally been considered part of,R. v. ariel, but molecular analysis suggests that it has been isolated for a long time and is a yet-undescribed separate subspecies or possibly even species (Weckstein, 2005).
Like othertoucans, the channel-billed is brightly marked and has a huge bill. It is typically 48 cm (19 in) long with a 9–14 cm (3½-5½ in) bill. It weighs 300–430 g (11–15 oz)[4]
Wherever the distributions of the subspecies meet, individuals with features that are intermediate compared to above described races are common due tohybridization. Some of these intermediate populations have sometimes been awarded subspecies status, e.g.theresae for the population in north-eastern Brazil andpintoi for populations in south-central Brazil (both areculminatus-ariel intergrades).
Found in forest and woodland. Prefers humid regions, but locally extends into drier regions (esp. along rivers). Mainly in lowlands, but locally to an altitude of 1,700 m (5,600 ft).
This species is an arboreal fruit-eater but will take insects, small reptiles, eggs and frogs. Typically consumed are lipid-rich fruits such asVirola andEuterpe palm fruits. Other fruits which the channel-billed toucan feeds upon are those borne byCecropia,Ficus,Hevea,Nectandra,Oenocarpus,Pourouma andPouteria. They will also consumepapaya,mangoes,avocados andpeppers if human intrusions into their habitat occur.[5][6] The call is a croaking "cree-op cree-op cree-op".
The parents are both active in raising the young. The white eggs are laid in a high unlined tree cavity. There is a gestation period of 18 days, and the parents both incubate for 15 to 16 days. However, they can be impatient sitters, often leaving their eggs uncovered for hours at a time. Newborn toucans remain in the nest after hatching. They are blind and naked at birth, and their eyes open after about 3 weeks. They have short bills and specialized pads on their heels to protect them from the rough floor of the nest. The feathers do not begin to expand until they are nearly 4 weeks old. They are helpless and unable to leave the nest for about 8 weeks, dependent upon both parents to feed them. After this, the young can care for themselves. They begin to leave the nest after 40 to 50 days, depending on size.
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