Wo die Freude sich blicken läßt, da haltet sie fest.

Muslima2006 posted a photo:

Honey Bee (Apis melifera) with Spear Thistle (Cirsium vulgare).

Summ, summ, summ!
Bienchen summ herum!
Ei, wir tun dir nichts zu leide,
Flieg nur aus in Wald und Heide!
Summ, summ, summ!
Bienchen summ herum!

Summ, summ, summ!
Bienchen summ herum!
Such in Blüten, such in Blümchen
Dir ein Tröpfchen, dir ein Krümchen
Summ, summ, summ!
Bienchen summ herum!

Summ, summ, summ!
Bienchen summ herum!
Kehre heim mit reicher Habe,
Bau uns manche volle Wabe,
Summ, summ, summ!
Bienchen summ herum!

Summ, summ, summ!
Bienchen summ herum!
bei den heilig Christgeschenken,
wollen wir auch dein gedenken,
Summ, summ, summ!
Bienchen summ herum!

(Verse 1 - 4)
lyric by August Heinrich Hoffmann von Fallersleben

I try to translate:
Hum, hum, hum!
Small bee hum around!
We do to you nothing too suffer,
fly only out to forest and heath!
Hum, hum, hum!
Small bee hum around!

Hum, hum, hum!
Small bee hum around!
Search in blooms, search in flowers
droplets and crumbs
hum, hum, hum!
Small bee hum around!

Hum, hum, hum!
Small bee hum around!
Turn home with enrich property,
building us some full honeycomb,
hum, hum, hum!
Small bee hum around!

Hum, hum, hum!
Small bee hum around!
with that Christmas gifts,
we also yours want to intend,
hum, hum, hum!
small bee hum around!

I confess I remembered only the refrain from my childhood.