TT #143 · Parshas Shemini · Aliyah 6 · Passuk 19
Chabad.org — Vayikra Chapter 11 with Rashi
English: the stork; the various kinds of heron; and the hoopoe, and the bat.
Chullin 63a.
E-Daf.com — Chullin 63a (Tsurras Hadaf)
וְאֶת הַחֲסִידָה. אָמַר רַב יְהוּדָה, חֲסִידָה – זוֹ דַּיָּה לְבָנָה, וְלָמָּה נִקְרָא שְׁמָהּ חֲסִידָה? שֶׁעוֹשָׂה חֶסֶד עִם חֲבֵרוֹתֶיהָ.
Name and conduct — The stork is identified as a white kite and its name is explained by the kindness it shows its companions.
The chasidah is identified as the white dayah, and its name is linked to its kindness toward its fellows.