Folks seem to like penguins….so much so that we even made the front page of the University of Delaware website! Hurray! This shot is of the Adelie penguin colony on Humble Island. We had just deployed a satellite transmitter on one of the birds so we would know where to send the underwater robots (Gliders and REMUS’s).
Remnants of the storm remain in the area and wind gusts are keeping the science boats at station today. Nevertheless, we did have a break a break in the clouds and the sun came out. The warm sun made the Gamage glacier very active and I happened to get a great video of calving. Right place, right time.
We headed out to Biscoe Point to deploy another satellite transmitter on a penguin. The plan was remove the transmitter from a Gentoo penguin which had been at Biscoe Point since mid-night. The challenge is to find the tagged bird amongst the rest! On the way, a large amount of brash ice had surrounded Biscoe Point, so we had 1-2km if slow travel through the ice. Marc Travers (our boat driver and expert birder) did an excellent job snaking in between the large chunks. Outboard motors and large chunks of brash ice don’t mix well. Hitting a large piece of ice can leave you on a boat with a busted motor. That is why we carry an extra motor in every boat.
When we arrived at Biscoe Pt. we found that an Elephant Seal had climbed into one of the Gentoo Penguin nesting areas. If the penguin chicks are too young or unguarded by its parents, they can be easily crushed by these massive seals.
Luckily it looked like the Gentoo chicks were old enough to avoid it. Occasionally a Gentoo adult would peck at the Elephant Seal’s thick blubber, but the giant beast didn’t seem to be bothered by it at all. We made our way around the Gentoo colony looking for our tagged bird. She happend to be perched right on a rock preening herself where we could see her plain as day. The birders quickly removed the tag and she went back to her nest.
Elephant Seals aside, the biggest threat to the chicks are Skua’s. These are aggressive scavenger birds swoop down and grab chicks right from their nests and make a meal out of them. There was plenty of evidence at Biscoe Pt. that the Skua birds had been active here.
Still, even with the ever present Skua, there were plenty of Gentoo chicks that were starting to look more and more like their parents. They are are starting to get their adult feathers. Their feathers are not waterproof yet, but they will be soon.
The next step was downloading the dive information from the tag. This data will help us understand how deep the penguins are feeding. The dive data will help us properly analyze the data coming from the underwater Gliders and REMUS vehicles. The Birders are able to download and ready the tag for its next deployment in just a few minutes with a laptop computer in the field. These are amazing little tags.
We walked around a small bay to the neighboring Adelie Pengin colony and were able to quickly identify an Adelie penguin that would be good for carrying our satellite transmitter. She was quickly tagged and released back to her nest. Her two grey puffy chicks are just to her right. We will be watching the satellite data closely to find out where she is eating. Then, we will send our underwater robots to sample that section of ocean. In a few days the Birders will head to Biscoe Pt. again to retrieve the tag, and thank her for her contribution to science.