International Owl Center
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  • Home
  • Programs and Events
    • Virtual Owl Expert Speaker Series
    • Virtual Programs
    • Owl Prowls
    • Special programs
    • Festival of Owls
    • Breakfast with the Owls
    • School and Group Programs
    • International Owl Awareness Day
  • Future Plans
    • Design Concept Contest
  • Our Research
    • Research Basics
    • Live Cam
    • Hear Individual Owls
    • Types of Great Horned Owl Vocalizations
    • Great Horned Owl Growth Chart
    • Background Info >
      • History of Rusty and Iris
      • What will happen to Rusty and Iris's young?
      • Owl Glossary
      • Great Horned Owl Facts
    • Blog
  • DIY Activities
    • What kind of owl are you?
    • Crafts
    • Dissecting Owl Pellets
    • Build an Owl Nest Box
    • Coloring Pages
    • Puzzles
  • I found an injured owl!
    • What do I do?
    • Find a Rehabber
  • Owls and You
    • Live an Owl-Friendly Life
    • Respectful Owl Photography and Observation
    • Owls as Pets
    • Owls Eating Pets
    • Owl Myths and FAQ
  • Visit Us / About Us
    • Visit
    • Our Owls
    • Staff and Board
    • History
  • Support Us
    • Memberships
    • Donate
    • Founder's Circle
    • Other Ways to Help
  • Educator Resources
    • Education Methods
    • Assessing Impact
    • Regulations
    • Workshop Summary
    • Resources
    • Links
  • Owl Conferences
    • Future Conferences
    • Past Conferences
    • Conference Planning
    • E-Newsletter
  • Store
    • New Arrivals
    • Apparel >
      • Hats
      • Shirts
      • Socks
    • Crafts & Stationery
    • Books & Education >
      • Species Guides
      • Kids' Books
    • Food & Edibles
    • Housewares & Decor >
      • Cups & Mugs
      • Decorations
      • Kitchenware
    • Jewelry & Accessories >
      • Bracelets & Watches
      • Earrings
      • Necklaces & Pendants
      • Pins
      • Bags & Purses
      • Rings
    • Miscellaneous
    • Memberships
    • Toys >
      • Plush Toys
      • Puppets
      • Puzzles
    • Donations
    • Gift Cards
International Owl Center

Great Horned Owl Growth Chart

We have compiled a document showing various photos of known age and gender owls to help rehabilitators and banders to more accurately age young owls. We have also included weights of our owls at known ages. Click the link below to download the full file.
Great Horned Owl Growth Chart
File Size: 2960 kb
File Type: pdf
Download File

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International Owl Center
126 E Cedar St.
Houston, MN 55943

(507) 896-OWLS (6957)
Karla@InternationalOwlCenter.org
​
501(c)3 organization
​EIN #45-5503365
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