Based on David Allen Sibley?s book, What It?s Like to Be a Bird our 2024 wall calendar features beautiful illustrations and seasonally appropriate info for any novice or ornithology expert. Measuring 12? x 12? this wall calendar includes monthly calendar grids and a bonus 4 month view of January 2025 April 2025. Printed on premium matte paper that works great with either a pen or pencil.