A scene by the pond

(this was written as a "payback" to red heron, the humorous/low-key cartoonist on CND. below was the cartoon named after "passerby". not able to come up with anything to match its cuteness and naughtiness, i wrote this poem to lavish my praise, but also hid a little trick of my own between the lines. with the riddle being too obscure to discern, the poem was perceived by others as outright flattering. and i had had SOME explanation to do. ;-)

A scene by the pond

Beyond the Walden Pond
Moved in a lad so handsome
Delicate was his shadow and
The name Red Heron

Excitement in the tranquil water
Stealthy glances darted over
His lowered head
And that exquisite color

"Rather delighted to meet you"
Chirped Grand O'l Cardinal
Nearby lingered Little Chickadee
So jovial Blue Jay sighed and flew

A beloved pond
Up down danced Red Heron

**it's also a riddle and here is the clue:

odd is one
even not two
what rhymes tree?
take with you