Content with tag porphyrins .

Feather content of porphyrins in Eurasian eagle owl fledglings depends on body condition and breeding site quality

Porphyrins are pigments produced in most animal cells during the synthesis of heme, but their importance for external coloration is unclear. Owls are among the few animals that accumulate porphyrins in the integument, where it could serve as a means of signaling. Here authors hypothesized that the porphyrin content of feathers may depend on body condition and breeding site quality in Eurasian eagle owl fledglings.