21. The species is most similar to Calystegia occidentalis which can occur in the same region occasionally. 22. Shasta Indians coincided blooming " Ranunculus occidentalis " with salmon runs in the summer. 23. The larvae feed on the American sycamore tree ( " Platanus occidentalis " ). 24. The brown pelican ( " Pelecanus occidentalis " ) also resides in this area. 25. Native to Australia, " Myrmecia occidentalis " is mainly distributed in Western Australia. 26. Some have recommended that " A . elegans occidentalis " be granted full species status. 27. This bird is often misidentified as the chiming wedgebill ( " Psophodes occidentalis " ). 28. These two species are " Alloschemone occidentalis " and " Alloschemone inopinata ". 29. Additionally " C . occidentalis " generally has more triangular leaves with less distinct lobing. 30. For social wasps, like " B . occidentalis ", nestmate recognition is crucial.