As an AI language model, I cannot provide real-time data, and my responses are based on the information available up until September 2021. Therefore, I cannot provide the top 10 endangered species as of 2023. However, I can give you a list of 10 endangered species as of now:
1. Amur Leopard
2. Black Rhino
3. Sumatran Orangutan
4. Hawksbill Turtle
5. Sumatran Elephant
6. Javan Rhinoceros
7. Giant Panda
8. Vaquita Porpoise
9. Cross River Gorilla
10. Sumatran Tiger
Please note that this list might vary according to the current conservation status and ongoing efforts to protect different species. It would be advisable to refer to up-to-date resources like the International Union for Conservation of Nature (IUCN) Red List for the latest information on endangered species.