"territoriality."

#12408662

25 May 2025

Pseudagrion damselflies (Odonata) resting on vegetation, flying low over forest undergrowth, and exhibiting territorial behavior in Tehatta, West Bengal, India, on May 25, 2025

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#12408663

25 May 2025

Pseudagrion damselflies (Odonata) resting on vegetation, flying low over forest undergrowth, and exhibiting territorial behavior in Tehatta, West Bengal, India, on May 25, 2025

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#12408665

25 May 2025

Pseudagrion damselflies (Odonata) resting on vegetation, flying low over forest undergrowth, and exhibiting territorial behavior in Tehatta, West Bengal, India, on May 25, 2025

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#11387707

6 July 2024

Terns are protecting chicks by driving egrets that enter their territory at Hetao Wetland in Qingdao, China, on July 6, 2024.

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#11000138

16 February 2024

A sign that reads 'Private Area, Do Not Trespass' is being displayed on a farm on the island of Boipeba, in Bahia, Brazil, on February 5, 2024.

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#10463806

5 September 2023

The northern cardinal (Cardinalis cardinalis), known colloquially as the redbird, common cardinal, red cardinal, or just cardinal, is a bird in the genus Cardinalis. It is also an introduced species in a few locations such as Bermuda and Hawaii. Its habitat includes woodlands, gardens, shrublands, and wetlands. The northern cardinal is a mid-sized perching songbird with a body length of 21–23 cm (8.3–9.1 in) and a crest on the top of the head. The species expresses sexual dimorphism: Females are a reddish olive color, and have a gray mask around the beak, while males are a vibrant red color, and have a black mask on the face, as well as a larger crest. The northern cardinal is mainly granivorous, but also feeds on insects and fruit. The male behaves territorially, marking out his territory with song. During courtship, the male feeds seed to the female beak-to-beak. A clutch of three to four eggs is laid, and two to four clutches are produced each year. It was once prized as a pet, but its sale was banned in the United States by the Migratory Bird Treaty Act of 1918.

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