あかえりひれあしであれば
赤襟鰭足鷸であれば
akaerihireashideareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of あかえりひれあししぎ

1. If it were a red-collared plover…; If being a red-collared plover…

Ba Conditional
Usually Written in Kana