March 10: gray whale dayWe left Santa Rosalia before dawn to travel for 2+ hours by bus and van, crossing the Baja Peninsula to the Pacific side. We travelled first to the town of San Ignacio and then to the Laguna San Ignacio, a protected breeding ground for gray whales. The town was established as a mission in 1672; the spot was chosen because of the ample supplies of fresh water. It was certainly surprising to drive for an hour through a landscape of sandstone, cactus and dust (plus a lone coyote) then suddenly to encounter open ponds and forests of date palms! The central town square is lovely, and the garden next to the church gave us a rare opportunity to see songbirds.
Laguna San Ignacio is carefully managed to protect the gray whales. Only the government licensed operator can take visitors in “pangas” (open skiffs with six rows of benches) to the designated whale viewing area and only ten pangas can be in the area at a time. Visitors can spend 90 minutes in the viewing area.
Gray whales are baleen whales (43-47 feet long) that feed on the bottom of arctic waters 10-200 feet deep. Their preferred prey are amphipods, small shrimp like creatures that live in the top layer of the ocean floor and feed on plankton, particularly diatoms. They winter in Baja, as their summer homes in Alaska are covered in sea ice. There are not good sources of food for them in their winter homes. This means that mothers have to produce 50 gallons of milk a day just from her own blubber to feed her calf.
The population of gray whales has gone through large swings since whaling ended and they gained protection in 1937. A recent decrease in the population may be related to a decrease in the amount and nutritional value of the aquapods. Autopsies of dead whales have shown them to be malnourished. The theory is that in warm years, there is less sea ice, so less substrate for the diatoms to grow under. The warmer water also encourages zooplankton, which eat the diatoms as they drift down from the melting ice in the spring. This reduces the food source for the amphipods and thus for the gray whales.
Back to today’s experience. Gray whales are not particularly bothered by the skiffs. Indeed some are curious and will come quite close, either gliding to the surface or even “spy hopping”, where they lift their head vertically out of the water to have a closer look. Their eyes are at the base of the mouth opening, so to get their eyes above water they have to lift their whole head out.
As we glided around at low speed in our skiff, there were whales “everywhere”. Some came close, others did not. Some “spy hop” out of the water with no warning, while others “blow” before they appear. You get a very different understanding of the size of these animals, as well as their gentleness, when you are on the ocean surface rather than looking down from a larger ship. In theory one can lure a whale to come closer to the panga by splashing or singing— but it really depends on what the whale wants to do!
As a quick catchup of yesterday, we walked in the morning at Bahia San Francisquito and then cruised south towards Santa Rosalia. It was a quiet day until nearly sunset, when we were surrounded by sperm whales and had a peregrine falcon circle the ship repeatedly at low altitude.
Pictured: Phainopepla ( isn’t he gorgeous?), Costa’s hummingbird, gray whale spy-hop with a panga for scale, peregrine falcon