When Chris Schauerman ventured into his chicken coop, the last thing he expected to find was this monster-sized egg.

The farmer, from Honeyoye Falls in upstate New York, was stunned to discover the giant, which weighs in at 138g, nestled among the hay. 

The average hen egg weighs between 35g and 77g.

'I just couldn't believe it. You open up the chicken coop and sitting inside the nest with five other eggs is just this behemoth,' he said.

But the discovery was bittersweet for Mr Schauerman - Roberta, the chicken who had laid the egg, died a few hours afterwards.

'I came up to the chicken and I nudged her. She was barely able to pick her head up before it fell back down to the ground,' he said.

Mr Schauerman went on: 'I was pretty excited when I saw it but also kind of sad because I knew the chicken put forth its last effort to give this egg.'

The egg - christened Little Roberta - is now destined for an omelette of immense proportions.

Shell shocked: Roberta passed away a few hours after laying the egg

Farmer Chris Schauerman found the monster-sized egg in his coop