I found this aphorism in my book of Korean aphorisms.
금년 새다리가 명년 쇠다리 보다 낫다
[keum.nyeon sae.da.ri.ga myeong.nyeon soe.da.ri bo.da nas.da]
this-year bird-leg-SUBJ next-year cow-leg MORE-THAN is-better-PRES
A bird’s leg this year is better than a cow’s leg next year.
This has an easy equivalent in English’s aphorism, “A bird in the hand is worth two in the bush” and such variants.