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Researchers wanted to know which factors influence lizard egg clutch size because such factors have been well studied in birds but not in lizards.
After they obtained data for over 3,900 lizard species, researchers determined that larger clutch size was associated with environments in higher latitudes that have more seasonal change.
We now know that lizards in higher-latitude environments may lay larger clutches to take advantage of shorter windows of favorable conditions.
Researchers obtained clutch-size and habitat data for over 3,900 lizard species and analyzed the data with statistical models.