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J | F | M | A | M | J | J | A | S | O | N | D |
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BRITISH COLUMBIA
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Uncommon, in the spray zone, usually on bird rocks, in moderately sheltered to fully exposed rocky habitats. Scagel 1957, p. 47. Scagel 1966, p. 68. Scagel 1973, p. 131. Hanic 1979, pp. 71 & ndash; 76. Hawkes et al. 1979, p. 90.
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COLUMBIA RIVER
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Uncommon, in bird-dung areas, in band 5 & ndash; 10 feet upward from the highest tide, with much spray and little drying. Doty 1946, p. 321. Doty 1947, p. 22.
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CAPE ARAGO
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Common, high on pilings under docks. Dawson 1965 a, p. 8.
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CAPE MENDOCINO
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Uncommon, on docks and pilings. Kjeldsen 1995, pp. 9, 10.
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POINT ARENA
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Common, on rocks and pilings in exposed habitats. Johansen 1966 a, p. 88. Kjeldsen 1995, pp. 9, 10.
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SAN FRANCISCO
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Common, restricted to rocks coated with bird feces, in the spray zone. Smith 1944, p. 53.
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