Karine Aigner / Researcher pulls back the undergrowth to reveal the ground nest of a Kirtland's warbler (Setophaga kirtlandii) family, Michigan, USA, July 2017.
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Karine Aigner / Portrait of Nathan Cooper checking for Kirtland's warblers (Setophaga kirtlandii) Michigan, USA, July 2017.
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Karine Aigner / Kirtland's warbler (Setophaga kirtlandii) chick sitting on three failed eggs. Michigan, USA, July 2017.
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Karine Aigner / Kirtland's warbler (Setophaga kirtlandii) male on black background. Michigan, USA, July 2017.
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Karine Aigner / Scientist Nathan Cooper refiting a male Kirtland's warbler (Setophaga kirtlandii) with a new nano tag, Michigan, USA, July.
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Karine Aigner / Portrait of a male Kirtland's warbler (Setophaga kirtlandii) held up in scientists hands, in breeding grounds of Jack Pine habitat. Michigan, USA, July 2017.
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Karine Aigner / Biologist Nathan Cooper holding male Kirtland's warbler (Setophaga kirtlandii) before replacing previous nano tag with a new one. Michigan, USA. July 2017.
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Karine Aigner / Biologist Nathan Cooper taking measurements from male Kirtland's warbler (Setophaga kirtlandii) before replacing previous nano tag with a new one.Michigan, USA. July 2017.
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Karine Aigner / Scientist Nathan Cooper holding a baby Kirtland's warbler (Setophaga kirtlandii) Michigan, USA, July 2017.
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Karine Aigner / Wild sage / Buttonsage (Lantana involucrata) on black background, a favourite food of the Kirtland's Warbler (Setophaga kirtlandii), Cat Island, Bahamas.