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Due to essential maintenance, we won’t be able to retrieve items from our closed stores over the weekend. Please submit requests for Monday 20 April by 10:00 on Friday 17 April. The library will remain open as usual. Thank you for your understanding.

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Oestrus detection: "Flehman lip curl"

Oestrus detection: cow with unruffled hair

Oestrus detection: tail paste rubbed off

A woman "in heat", standing in a field with her breasts exposed and holding a basket of flowers, accompanied by three cupids. Lithograph by J. Laurens, ca. 1857, after N. Diaz de la Peña.

Blood from vagina of a cow in oestrus

Oestrus detection: Triggered "Kamar"

Red vulva of a cow in oestrus

Oestrus detection: dribbled on cow

Oestrus detection: sexually active Freisians

A cow encouraging a potential mounter

Oestrus detection: cow with ruffled hair

A mounted cow (not in heat) walking away

Oestrus detection: tail paste in position

String of mucus from cow's vagina

A cow in heat standing to be mounted

Vulva of a cow not in oestrus

Oestrus detection: "Kamar" in position

Oestrus detection: aggression (cows butting)

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