The Dendrobates leucomelas "Nominant / Standard" is the most common and widely recognized color morph of the yellow-banded poison dart frog (also known as the bumblebee poison frog), native to Venezuela, Guyana, northern Brazil, and eastern Colombia. It is the "default" or classic appearance of the species in the amphibian hobby and a popular choice for beginners due to its hardiness and social nature.

Characteristics 

Coloration: Characterized by a bright yellow to yellow-orange or occasionally greenish base color with three broad, black, and highly variable crossbands or spots across its back. This aposematic (warning) coloration is a key feature.

Size: A medium-sized dart frog, with adults typically ranging from 1.2 to 2 inches (3.1 to 5 cm) in length, rarely exceeding 1.6 inches on average. Females tend to be slightly larger than males.

Behavior: They are diurnal, active, and moderately bold. They are primarily terrestrial but are also good climbers, using glandular adhesive pads on their toes to navigate vegetation and hardscape. They are known for having a moderately loud, bird-like trilling call, which males use to attract females and establish territory. They do well in groups, though females may occasionally wrestle with each other during breeding season. Uniquely, it is the only poison dart frog species known to estivate (become dormant) during dry spells in the wild.

Toxicity: In the wild, they are highly toxic, acquiring batrachotoxin alkaloids from their diet of specific ants and insects. Captive-bred frogs, which are fed a non-toxic diet (typically fruit flies), lose this toxicity and are harmless.  

Habitat and Care (in Captivity)

Origin: Native to the Guianan Orinoco drainage basin of Venezuela, extending into Guyana, Brazil, and Colombia.

Terrarium: A tropical vivarium with high humidity is necessary. They need plenty of leaf litter, live plants, and hiding spots, such as coco huts. A minimum of 1 square foot of floor space per frog is a good guideline. Water features should be very shallow, as they are poor swimmers and can easily drown.

Temperature: The ideal temperature range is 70–80°F (21–27°C) during the day, with slight drops at night.

Humidity: High humidity levels, ideally 70–90%, are required and can be maintained with misting systems.

Diet: They are insectivores and should be fed small, live, vitamin-dusted insects in captivity, such as flightless fruit flies (Drosophila melanogaster and D. hydei), along with springtails and isopods as microfauna. 

Breeding: They are relatively easy to breed in captivity. Females lay clutches of 4-10 eggs in secluded spots, and males guard and keep them moist, eventually transporting the hatched tadpoles to a small body of water. Tadpoles are cannibalistic if kept together in a small pool.