a24f8ac4_uxent_Wildlife_Research_Center__Reference_on_Site
[Did You Know...] that biologists use lice to identify cowbird hosts? [Reference on Site] 
The host specificity of avian lice (Phthiraptera) may be utilized by biologists to investigate the brood parasitism patterns of Brown-headed Cowbirds (Molothrus ater). As nestlings, brood parasites have a unique opportunity to encounter lice that are typically host specific. More information...
Did you know? - Patuxent Wildlife Research Center
Reference on Site