Hey Cindy.
Well, the BHPs average about the size of a boa constrictor. Between 6 and 8 feet....with a medium build. I like to keep mine on the lean side.
There is a difference in east and west size range, as well.
Actual Pilbara westerns.... only get about 5-5 1/2 feet long (about the size of an adult Woma).
Easterns, NT's and the rest of the "west" animals can reach 7-8... on average.

Of course, a captive diet will cause animals to get slightly bigger...and the fact that BHPs don't eat rodents in the wild very often....will make for larger animals.. (as they don't get that type of fat naturally).

Keepers overfeed them as they constantly are looking for food. They aren't like Carpets.....and sit and wait for something...they actively search for food and seem hungry all the time.
And, in the wild...they are eating prey with very little fat content. Snakes, monitors, bearded dragons, frilled's, etc..

It's all in the diet.
I've sold 07 BHP pairs to guys that have them 7 feet already...not what I'd do but...to each their own. Mine that age.... are 4 feet.

Cheers,
D.

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