Issued in 2002, the first stamp shows a variety of bird species including the scarlet macaw (Ara macao), thick-billed parrot (Rhynchopsitta pachyrhyncha), keel-billed toucan (Ramphastos sulfuratus), red-lored amazon (Amazona autumnalis) etc.

The second stamp was issued in 2009 and it depicts the California condor (Gymnogyps californianus), a species of vulture. It is listed as critically endangered. It has an impressive lifespan of up to 60 years. As other vulture species, it feeds on carrion.