And then there is the Sacrifice – this occurs when somebody who has been on the island for a long time leaves, and then a really good bird shows up. This has happened to me several times when I leave for my break in mid-October. But I have also seen many good birds while still on the island. So again, this is another example of a Farallon superstition that we all love to distort into reality.
When I returned to the island from my two-week break on 23-Oct, my friends Matt Brady and Oscar Johnson were headed home after lengthy stays on the island. The superstitious ones of us were all expecting that a mega-rarity would be found soon afterwards. With a major storm raging outside, though, most birds were leaving, and we found very few arrivals. The strong northwest winds that followed the storm continued to keep migrants away until the wind slackened on the 27th and 28th, just before the arrival of the next big storm. With light east winds, we found several new West Coast songbird migrants such as Fox Sparrow and Northern Mockingbird. A flock of five Great and two Snowy Egrets flew by the island; without a marsh, the Farallones do not provide ideal foraging habitat for herons and egrets, so these birds made a big lap around the island and headed back to the mainland. Palm Warblers are continuing to come out to the Farallones in good numbers; so far we have recorded 37 arrivals, 30 of which were banded. We found a gray-headed Orange-crowned Warbler that is either from the intermountain race called orestera or the northern taiga form called celata. The strong yellow color on the chest, light yellow on the throat, and strong eye arcs are marks that are more in favor of orestera, but the bill length was 1 mm too short for orestera and fit better for celata.
Late on the 28th, Elizabeth Ames found a young male Summer Tanager hunkered down in a chute on the north side of Lighthouse Hill. Summer Tanagers have averaged one per year on the Farallones, but somehow I had managed to miss them over the last several years. This one was a molting juvenile male, with mostly yellow plumage and few, scattered red feathers. Two days later Elizabeth found a female Summer Tanager at Corm Blind Hill. It’s funny how a bird can elude you for years and then suddenly you see two in three days.
On 1-Nov, the Giants won the World Series, and we had our high count of the year for Brown Pelicans at 95. This has been one of the worst years ever for Brown Pelicans. Usually, pelican numbers peak at around 2000. One theory for their decline is that their prey species has declined in the area and the birds are foraging elsewhere. This seems likely for the adults, but the ratio of adults to young is about 60 to 1. So what happened to the last breeding season? The lopsided ratio seems to suggest that there was nearly complete reproductive failure.
At one point, Erika pointed out a bird flying overhead. I got a quick glimpse of it and heard it give a distinctive rattle call. I told her that it was a longspur, probably Lapland, and that she should go look for it on the Marine Terrace, a flat area with dead, matted-down vegetation. She took a quick look, but could not relocate it. After the sailboat left, I saw Noah and suggested that he should look for the longspur because it could be a Smith’s Longspur. This is a very rare species in California, and I didn’t really believe that it was one, but instead I was trying to encourage Noah to look for it and consider the possibility. A half-hour later, Noah came back into the house and showed me some photos that he had taken of the longspur. We tried to convince each other that it was just a drab Lapland Longspur, “the bill seems too big for Smith’s” and “the spacing of the primaries isn’t right.” But the drab greater coverts and buff-colored belly were not right for Lapland Longspur either. Eventually I decided that I needed to see this bird to be on the safe side. I brought my camera along, and Noah and I got many really good photos of it that show it to be a Smith’s. This was the first time this species had been seen on the island, and just the 8th time it had been seen in California! Ironically, I had included Smith’s Longspur just two weeks previously on my top 10 list of new species for the Farallones. This bird has now been here for three days! So, do good birds show up on Boat Days? Was Dan the Sacrificial Lamb? Or, are these just silly superstitions?
Written by Jim Tietz
PRBO Farallon Fall Biologist