Organisms in same genus but with different species

This picture has three different species of poison dart frogs, which are all from the same genus Dendrobates.

They are (from the right):

1. Dendrobates azureus (blue poison dart frog)

2. Dendrobates leucomelas (Yellow banded poison dart frog)

3. Dendrobates tinctorius (Dyeing Poison dart frog)

Location: 1 Central Wharf, Boston MA