Around 400 to 350 million years ago the fist vertebras clambered onto land, they were tetrapods.
The first land vertebrates appeared in the: Devonian
After fish, amphibians were the next group of creatures to evolve on Earth. Amphibians are cold-blooded vertebrates that can live both on land and in water. They were the first vertebrates to colonize terrestrial habitats.
There were many challenges that vertebrates had to overcome in order for them to colonize land habitats. Three of the most challenging tasks that vertebrates had was to learn how to eat the food on the land to sustain their energy and nutritional needs, how to breath, and how to defend themselves against predators.
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The first organisms to adapt to life on land were likely plants, specifically mosses and liverworts. These early plants lacked roots and vascular tissues, but they were able to survive and reproduce in terrestrial environments. Their adaptation to land ultimately paved the way for other organisms, such as fungi, insects, and eventually vertebrates, to colonize and thrive on land as well.
Spain was the first European power to colonize California.
A Jaw Eggs that would not dry out
The first to colonize Jamaica is the Spaniards
Animals don’t colonize. People do.
First were the plants and fungi, then came the arthropods, then finally the vertebrates.
Amphibians were the first vertebrates that came out of the water. The first vertebrates that could live outside of the water though were reptiles. or class reptilia this was during the Carboniferous period.
The first vertebrates to come onto land were fish-like animals that developed lungs and could thus stay on land for extended periods. These evolved into terrestrial amphibians (although many amphibians require water in which to lay eggs, and some are aquatic).