How big was an Ivory-billed Woodpecker?

Factful math: Grade 3rd-5th

Math skills: Measurement (Unit conversion) Length

Related Environmental issues: Biodiversity / Deforestation

The U.S. declared that 23 species have gone extinct.

Ivory-billed Woodpecker, which is one of the world’s largest woodpeckers, is also extinct.

It has a wingspan of 75 cm.

How long is the wingspan in inch?

1 inch = 2.5cm


75 / 2.5  = 30 inches

Source: NPR, Wildlife Officials Take 23 Species Off The Endangered List Due To Extinction



The objective of Factful Environmental Math Problems is to cultivate our young people’s skills to analyze and evaluate fact-based data for understanding our world, while improving their math skills and critical thinking skills.

With the rise of the Internet and new technology, building skills to analyze and evaluate fact-based data becomes increasingly important for our young people to prepare for this rapidly changing world. These skills minimize their chances of being brainwashed by false information and making uninformed decisions and ultimately help develop their critical thinking skills. (Read more)

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Published: March 26, 2020

Price: $6.25