The longest incubation was recorded in the case of an egg of the mallee fowl (Leipoa ocellata), Australia, which took 90 days to hatch, compared with its normal 62 days.
What is the longest egg incubation?
This epic brooding period—53 months in total—is the longest known for any animal. The famous emperor penguin—a model of parental sacrifice—incubates its egg for just 2 months. The record-holder among octopuses was a captive Bathypolypus arcticus who guarded her eggs for 14 months.
Can eggs hatch after 23 days?
Sometimes it takes longer and sometimes shorter times. I've had a hatch as late as day 25 (as in the image below).
Will eggs hatch after 26 days?
However, this can vary depending on various things, most importantly the temperature levels in the incubator. If the temperature drops for any reason, the hatch will take longer. I've had chicks hatch as late as 26 days after setting.
Can chicken eggs still hatch after 21 days?
If there are still unhatched eggs at day 21, don't despair. It is possible that timing or temperature went slightly awry, so give the eggs until Day 23. Candle any unhatched eggs to see if they are still alive before discarding them. Keep in mind that when hatching eggs, you will likely end up with roosters.
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