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  • Don, From my experience, all Nazca Boobies I have looked at in the Galapagos have had white in the central tail feathers. I am surprised by your numbers. Given that most Nazca Boobies are from the Galapagos, I would say that world wide the proportion with white in the tail may be higher than your estimates. I will be in the Galapagos again in a few days and can check to see if I...
    Alvaro Jaramillo Jul 20
  • Hello Birders, I posted some quickie info to penbirds yesterday, in case anyone could find the shearwater from shore. We found it at the start of our pelagic trip, very close to shore. Sadly no one did find it. But here is the full story. Minutes from exiting Pillar Point Harbor, we saw this shearwater coming towards the boat with bowed wings, looking almost red-footed booby like...
    Alvaro Jaramillo Jul 16
  • HI folks, Birding in Half Moon Bay (San Mateo County) today, and the weirdest bird went by. It was an all dark swallow! My mind went to what I know, it looked like a female Peruvian Martin, which are smaller than our martins. That was nuts, so I hung in there trying to get another look. It took more than 20 minutes but eventually I re-found it. Not a Peruvian Martin, how about a...
    Alvaro Jaramillo May 25
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  • Hi folks Interestingly, once again Elegant Terns are showing up and displaying way up here in the central part of the state. They showed up in the last few days of April in Monterey-Santa Cruz, and made it to San Mateo – Marin by May 1. They are calling, displaying and generally acting as if it was Baja California around here. The last couple of seasons that this has happened the...
    Alvaro Jaramillo May 3
  • Hello folks. I hope you are all easing into a great spring of birding. I just wanted to quickly let you all know that the initial schedule for our pelagic trips is up online: http://alvarosadventures.com/boat-trips/pelagics/ The spring trip this year will be on May 20 th , out of Half Moon Bay. We are running trips from Half Moon Bay, Monterey Bay, to the Farallon Islands, and back...
    Alvaro Jaramillo Apr 18
  • Blake, You know there is very little information on the breeding populations on the West Coast of Mexico, particularly with respect to numbers and trends. One would assume that the birds in California come from this population. However, I would also argue that a lot of the birds on the Pacific are actually Caribbean or Atlantic breeders, just based on the sheer number of birds in...
    Alvaro Jaramillo Apr 8
  • Calbirds Wow, what a neat looking bird. Indeed it seems too much of an oddball for this to be a European Lesser Black-backed Gull. Cool stuff, and congratulations to Brian and the entire Monterey Gull watching “nucleus” for coming up with some really good stuff this winter. I think a lot of birders get confused with gulls, and it is even more confusing when names appear that...
    Alvaro Jaramillo Mar 25
  • Debi, I am picking up on something that you said that is perhaps confusing? As you note there are a bunch of seabird species that associate with the habitat of albacore, that warmer nutrient poor, very blue and clear water. However, several of the species that you mention are migrants that move through here irrelevant of where the albacore are, such as the jaegers, Sabine’s Gull...
    Alvaro Jaramillo Sep 29, 2016
  • Hello Calbirders On Sept 15, we observed a very odd Leach’s group storm-petrel off Half Moon Bay, I posted about it at the time and thought I would give a wrap up on this critter. Here are the photos, and video: https://www.flickr.com/photos/alvarojaramillo/29629732081/in/datetaken-public/ We wondered if it was a Townsend’s Storm-Petrel. For those of you wondering, what the...
    Alvaro Jaramillo Sep 29, 2016
  • Hi folks We had a really, really interesting pelagic out of Half Moon Bay today sampling San Mateo and San Francisco waters. When we were offshore near the Pioneer Canyon, in a little density of Ashy Storm-Petrels a weird white-rumped storm petrel went by. Fortunately, it was extremely confiding and allowed multiple views, and prolonged study. The real problem with regards to the...
    Alvaro Jaramillo Sep 15, 2016