Barry Mansell / Yellow-throated Vireo (Vireo flavifrons), male, High Island, Texas , USA, April

Barry Mansell / Solitary Vireo / Blue Headed Vireo (Vireo solitarius) perched, High Island, Texas, USA, April

Marie Read / Male Blue-headed / Solitary vireo (Vireo solitarius) in breeding plumage singing, New York, USA, May

Gerrit Vyn / Red-eyed Vireo (Vireo olivaceus) portrait in profile, perched on branch. Tompkins County, New York, USA, May.

Gerrit Vyn / Blue-headed / Solitary Vireo (Vireo solitaruis) perched on a branch, Tompkins County, New York, USA, May.

Marie Read / Warbling Vireo (Vireo gilvus), singing in spring, New York, USA

David Kjaer / Yellow-throated Vireo (Vireo flavifrons) perched in tree, Texas, USA

David Welling / Black-capped Vireo (Vireo atricapilla) 2 year old banded bird, Balcones Canyonlands NWR, Texas, USA, Vulnerable

Barry Mansell / Red-eyed Vireo (Vireo olivaceus) male on branch. High Island, Texas, USA

Barry Mansell / White eyed vireo {Vireo griseus} Texas, USA

Barry Mansell / White eyed vireo {Vireo griseus} Texas, USA

Rolf Nussbaumer / Red-eyed Vireo {Vireo olivaceus} profile, South Padre Island, Texas, USA.

Rolf Nussbaumer / Warbling Vireo {Vireo gilvus} South Padre Island, Texas, USA.

Rolf Nussbaumer / White eyed vireo {Vireo griseus} removing fecal sac from nest with chicks in Huisache Tree, Welder Wildlife Refuge, Sinton, Texas, USA.

Rolf Nussbaumer / Philadelphia vireo {Vireo philadelphicus} adult on branch, South Padre Island, Texas, USA.

Rolf Nussbaumer / Plumbeous vireo {Vireo plumbeus} adult on nest, Arizona, USA

Rolf Nussbaumer / Plumbeous vireo {Vireo plumbeus} adult, Arizona, USA

Rolf Nussbaumer / White eyed vireo {Vireo griseus} adult feeding young in nest in Huisache tree, Welder Wildlife Refuge, Rockport, Texas, USA

Todd Pusser / White eyed vireo {Vireo griseus} adult sitting at nest, Florida, USA. Ocala National Forest

Barry Mansell / White eyed vireo {Vireo griseus} Texas, USA

Tom Vezo / Solitary vireo {Vireo solitarus} Long Island, New York, US