Sam Hobson / Blood samples collected by scientists working with urban goshawks (Accipiter gentilis). Berlin, Germany, May 2014. Nominated in the Melvita Nature Images Awards competition 2014.

Francisco Marquez / Researcher collecting a blood sample from a Greater flamingo (Phoenicopterus ruber) juvenile's leg during the ringing process, Fuente de Piedra lagoon, Malaga, Spain. August.

David Perpinan / Field workers collecting blood from Blue-fronted amazon parrot (Amazona aestiva) chicks, Pantanal, Mato Grosso do Sul, Brazil.

Doug Perrine / Volunteers restraining a recently weaned male Hawaiian monk seal (Neomonachus schauinslandi) while Marine Mammal Center veterinarian Michelle Barbiers takes a blood sample prior to tagging. Keokea Bea...

SCOTLAND: The Big Picture / Vet from The Royal Zoological Society Scotland / RZSS taking a blood sample from a sedated Scottish wildcat (Felis silvestris grampia) male. Inside RZSS mobile vet unit, Strathsprey, Cairngorms Nation...

SCOTLAND: The Big Picture / Veterinarian from The Royal Zoological Society Scotland / RZSS with blood sample from Scottish wildcat (Felis silvestris grampia). To be used for genetic testing. Inside RZSS mobile vet unit, Strathsp...

Sam Hobson / Blood sample collected by scientists working with urban goshawks (Accipiter gentilis). Berlin, Germany. May 2014.

Sam Hobson / Blood samples collected by scientists working with urban goshawks (Accipiter gentilis). Berlin, Germany. May 2014.

John Cancalosi / Barite (BaS04) on Cerrusite Mibladen Morocco Barite (orange) is the major ore of barium (barium sulfate) - Mineral class: sulfates - Barite is an important commercial mineral - Widely used as a pigmen...

John Cancalosi / Barite (BaS04), the main ore of barium, with Chalcopyrite. Mineral class: sulfates, barite is an important commercial mineral, widely used as a pigment, and used in medical tests. Sample from Dreislar...

John Cancalosi / Barite (barium sulphate, BaS04) on Cerrusite. Barite (orange), the major ore of barium, is an important commercial mineral widely used as a pigment and in medical tests. Cerrusite (lead carbonate, PbC...

Jen Guyton / Woman offering her child's finger to be pricked for malaria test in Momba community in park's buffer zone during Medecins Sans Frontieres event. Outskirts of Gorongosa National Park, Mozambi...