Since you probably know that a booby is a bird in the genus Sula, it might help to point out that Tower is a small desert island in the far NE of the Galapagos Archipelago.
So while “Boobies on Tower” might be an attention grabber for most, for Galapagueños, it’s as nonsensical as “Buildings in New York.” Of course there are boobies on Tower – what about them? Well, we saw plenty of both Red-footed and Nazca on the WINGS tour aboard the Integrity this past November. I’ll show some photos and even a couple videos from our 6th day on this cruise as I do some catch-up with my photo backlog.
The habitat on top of the island is mostly a Palo Santo woodland – a tree (Bursera graveolens) that can withstand a few years of drought as a leafless skeleton, only to leaf out lushly in response to rain.
Nacza Boobies, on the other hand, nest on the ground. One thing I like about this photo is how it shows the actual physical impact – the trail – that thousands upon thousands of tourists actually have on this island. For one, it’s not crowded with tourists. And for another, compared to the huge majority of the islands’ area that is completely off limits to any kind of trespass, the actual impact of having people on the ground, in and amongst breeding birds, is incalculably small.
Here’s a video of a male Nazca Booby next to the trail, singing to passing females.
We also saw some nice land birds, such as this Galapagos Mockingbird.
This Large Ground-Finch (video below) was eating the famous Tribulus seeds (read Beak of the Finch by Jonathan Weiner), but I found it fascinating how it unearthed the fruits by using its beak as an anchor to kick back the heavy gravel with both feet simultaneously. How many species of birds do this?
And the food for some of the larger-beaked finches, Tribulus cistoides. Here in Arizona, we call this puncture-vine or goats-head, as the thorn-bearing seed heads do nasty things to your bicycle tires.
This last photo is of the endemic subspecies of Brown Pelican, Pelecanus occidentalis urinator. What at first seems like a ridiculous and vulgar trinomial actually is from the Latin for “plunge” or “dive.”
Photo at top: immature Nazca Booby by Rich Hoyer
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