By highlighting threatened or endangered species, SeqOnce hopes to draw attention to conservation efforts. As biologists, we believe humanity is better served when ecologies are maintained and there is diversity of life.


The rhinoceros is a magnificent animal, but three of the five species are critically endangered: Javan rhino, Sumatran rhino, and the Greater One-Horned rhino.

These rhinos are threatened by poaching and habitat loss. We can help through efforts such as Sumatran Rhino Rescue. The White rhino was nearing extinction, yet has been brought back from the brink through extensive conservation.

Poison Dart Frogs

These frogs are native to rainforests of South and Central America. About a quarter of the more than 200 species are listed as threatened or critically endangered the blue poison dart frog (Dendrobates tinctorius aureus ) is one of these. The primary threat to poison dart frogs is the loss of habitat due to logging and clearing of the rainforest.


The majestic and powerful African lion has no natural enemies, but due to loss of living space and conflict with people the number of lions has been greatly reduced. There are half as many lions than there were 25 years ago. A surprising fact is that there are more rhinoceros than lions. There are only about 23,000 lions left in the wild and they are extinct in 26 countries across Africa, and has consequently been listed as vulnerable to extinction.

SeqOnce supports protecting and conserving endangered and threatened species. A portion of our profit goes to helping those engaged in the critical fieldwork of conservation.

If you’d like to help, please click on one of these four-star conservation groups: