1917 BIRDS OF THE SOUTHERN CALIFORNIA ISLANDS 109 
seems to be in a good line of migration. Santa Catalina is much more diversi- 
fied than the last, in fact it is next to Santa Cruz in this respect, and if much 
systematic work were done upon it, I believe that it would surpass San Clemente 
in the number of species in its avifauna. It is the most often visited of the isl- 
ands, and many ornithologists of note have collected there, but usually their vis- 
its have been limited to several days. The Coronados fall fourth in this list, 
rather surprising for such small barren spots, but then they are many times more 
often visited than any other of the smaller islands. It is to be expected that not 
so many forms occur on San Nicolas, as it is rather barren and well out to sea. 
The avifauna of Santa Barbara Island is of quite respectable size. It has a good 
list of water birds, and although there has not been a great deal of work done 
there for any period of time, it seems to be a favorite resting place for the few 
small land migrants that pass that way. There has been less systematic work 
done on Anacapa, but it is much more often visited for periods of several days 
at a time. The number of species recorded from both San Miguel and Santa 
Rosa are very small for the size of the islands, but neither is especially attractive 
to bird life. Then, too, there has not been much work done on San Miguel and 
less on Santa Rosa, where it is difficult to get a permit to stay on the island. 
TABULATION OF SPECIES BY MANNER OF OCCURRENCE 
In preparing a table of seasonal occurrence of the different birds, I have 
been obliged to use my own judgment to a certain extent. That is, when there 
are but a couple of records for a species during the winter, it is hard to tell for 
a surety whether it oceurs regularly during that time of year, or should be 
classed as a casual visitant. In such case I have had to consider the conditions 
under which the record was made, the abundance of the species upon the mainland 
during the same season, and several other factors. It will therefore be seen that 
the tables are only approximately correct, but as nearly so as it is possible for me 
to make them under the circumstances. 
RESIDENTS 
1. Lunda cirrhata 19. Accipiter cooperi 
2. Ptychoramphus aleuticus 20. Buteo borealis calurus 
3. Brachyramphus hypoleucus 21. Halizetus leucocephalus leucocepha- 
4. Cepphus columba lus 
5. Uria troille californica 22. Falco peregrinus anatum 
6. Larus occidentalis 23. Falco sparverius phalaena 
7. Oceanodroma melania 24. Pandion haliaétus carolinensis 
8. Oceanodroma homochroa 25. Aluco pratincola 
9. Oceanodroma socorroensis 26. Asio wilsonianus 
10. Phalacrocorax auritus albociliatus 27. Speotyto cunicularia hypogaea 
11. Phalacrocorax penicillatus 28. Colaptes cafer collaris 
12. Phalacrocorax pelagicus resplendens 29. Calypte anna 
13. Pelecanus californicus 30. Selasphorus alleni 
14. Ardea herodias herodias 31. Sayornis nigricans 
15. Aegialitis nivosa 32. Otocoris alpestris insularis 
16. Haematopus bachmani 33. Aphelocoma insularis 
17. Lophortyx californica vallicola 34. Corvus corax sinuatus 
18. Zenaidura macroura marginella 35. Sturnella neglecta 
