Tag Archives: STEM outreach

HCC-ALC: Owl Pellets Lab

6 Nov

After an owl hunts, how does it eat its prey? With a fork and a knife? Although modest, owls prefer to keep it simple by swallowing their prey whole. Impressive as it sounds, Jessika, a student at HCC- Adult Learning Center in Holyoke, asked, “Does that mean owls can digest bones and feathers?” The answer is…no! The undigested parts form a tight pellet that is later regurgitated. Gross! But not as much if it’s sterilized.

This past Wednesday (Nov. 1), through STEM Outreach, Thomas Gralinski, Ellen Sulser (‘18) and I (Erika Melara ‘20) visited the learning center and introduced the concept of Food Chains and Food Webs to a small class of pre-GED adult learners. After delivering a baseline presentation, we prepared a lab activity to dissect owl pellets. We particularly focused on the barn owls which usually prey on insects, reptiles, bats, and small rodents. An interesting fact about these owls is that they can hear a mouse’s footsteps from 30 yards away! This is fascinating, considering most of us can barely hear our names being called across the room.

Although some students were reluctant at first, by the end of the lab activity, they were determined to find and classify each of the bones to later boast about their owl’s appetite. Personally, I was bewildered about how some of the bones (i.e. skulls) were intact and well-preserved. Take a look at some of the pictures!

-Erika Melara is a Scorpio, who comes from El Salvador, where she enjoys eating pupusas and going to the beach.