Translation

CHASTE are their instincts, faithful is their fire,
No foreign beauty tempts to false desire;
The snow-white vesture, and the glittering crown,
The simple plumage, or the glossy down
Prompt not their loves:-- the patriot bird pursues 
His well acquainted tints, and kindred hues.
Hence through their tribes no mix'd polluted flame,
No monster-breed to mark the groves with shame;
But the chaste blackbird, to its partner true,
Thinks black alone is beauty's favourite hue. 
The nightingale, with mutual passion blest,
Sings to its mate, and nightly charms the nest;
While the dark owl to court its partner flies,
And owns its offspring in their yellow eyes.