WORD SPIRAL

Starting from 1, fill in the grid clockwise with four-letter words. The last letter of each word becomes the first letter of the next to reveal a mammal.

1. Partially open 2. Drive on this 3. Action 4. Rush 5. Difficult 6. Protest 7. Egg-shaped 8. Weaving apparatus 9. Manufacture 10. Muslim ruler 11. Hazard 12. Flying toy 13. Looks at carefully 14. Ooze 15. Paratrooper, informally 16. At the summit