Legget was sentenced on Friday, after earlier being found guilty of three Biosecurity Act charges of knowingly possessing unauthorised goods, at a judge-only trial in March.
Judge Charles Blackie fined Leggett $15,000 on each charge and $630 costs - $45,630 in total.
Northern Investigations Manager David Blake said she put the poultry industry and wild bird populations at "considerable risk" by attempting to illegally import live eggs for her hobby.
He said it was a deliberate and calculated attempt to avoid New Zealand's biosecurity measures by someone who understood the system.
"She put the poultry industry and wild bird populations at considerable risk in order to hatch eggs for her own enjoyment. The serious nature of her actions has been reflected in the sentence."