How much food does a wyvern need in a day?

What would be the daily calorie requirements of a flying creature that could carry 200 lbs on its back? Are there features that could make a significant difference in this calculation (cold blooded/warm blooded, mammalian vs reptile, marsupial vs egg laying ect)? (If evidence is brought that supports a significant difference in calories needs based on this I will clarify my question.)

In nature I think the wyvern would only fly to hunt for food, to find mates, and to look for new nesting grounds. Though domesticated ones would have a more aggreesive flight schedule and need more food.

As for how high/far/fast, pick options that tend towards lower calorie requirements. Evolutionarily speaking, lower calorie requirements makes it easier for the animal to survive (unless it's too slow to catch prey).

I'll include that the planet is currently earth. Azuaron's answer may end up being the best. I chose 200 lbs because I knew it was at the very extreme end of what could be possible, if it even was.

posted over 7 years ago

PCSgtL‭

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