Hello again from Ship Island! Mark and I are back at home base after visiting beautiful Petit Manan Island! While saying goodbye to puffins is not easy, we are excited to come back to a thriving population of Common Tern chicks. These little bundles of fuzzy feathers are just delightful and it’s hard to keep a straight face every time you see them scampering around the colony. With chicks, however, comes hard work.
Before the chicks began to hatch, we set up productivity plots. Productivity plots are essentially a group of nests that have fences around them. These plots allow us to closely monitor a subset of tern nests, which gives us insight into the success of the colony this season. On Ship we have six plots with a range of 5 to 11 nests in each plot. We visit the plots every day, monitoring nests that have yet to hatch, taking daily weight measurements of and banding chicks. From time to time, we see eggs that never hatch and chicks that don’t make it. While sad, this is part of why these plots are important. Our productivity plots let us know the effects of severe weather or can clue us in to potential predators. With this in mind, we’re very happy to report that we have a strong and growing chick population this year on Ship!
With so many chicks running around, we’re able to begin our provisioning studies here on Ship Island. These provisioning (feeding) studies are set up by designating several nests that are easily seen from the blinds. As the nests hatch, chicks are banded and colored according to nest number and chick order. For example, Nest 1 is green, so the A chick is marked green on its head, the B chick green on its breast and the C chick green on its back. Each nest has its own color and the chicks are marked in the same pattern. Once the provisioning study is under way, we wait for adults to return to their chicks with food in their bills. When they arrive, we record what they’re bringing in and who they’re feeding it to. Identifying the fish isn’t difficult; trying to see what it is before a hungry chick swallows it whole is the hard part! So far we’ve seen plenty of herring coming in, some hake and sandlance, and the occasional pollock. Again, all good news for the colony and its chicks!
That’s all for now! Hope you’re enjoying the weather and we’ll be back next week!