what is the difference between male and female robins?
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The male robin is brighter in color than the female. His eye ring, bright beak color, black head, and white throat markings all show this bird is a male. The female's feathers look washed out and faded compared to the darker, richer colors of the male.
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Female Barred Owls are up to a third larger than males. Males and females show no obvious plumage differences, but if one member of a pair is larger, then it is probably the female.
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The most obvious differences between male and female Bald eagles are their size. Females are usually a third of the size larger than males. ... With the female's larger size, this generally means a larger hooked beak and a hallux (back, largest talon) that can reach over three inches in length.
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Distinguishing between the two sexes of greater spotted woodpeckers is straightforward since the male has a red patch on the back of his head whereas the female's head is simply black and white. Both male and female great spotted woodpeckers have a bright red underside at the base of the tail.
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Male pigeons are usually larger than females. ... Male pigeons “bow and scrape,” bowing their heads, while scraping their tail feathers along the ground. Watch a pair of pigeons mate. As with most animals, the male pigeon will position himself on top of the female, making it easy to distinguish the two sexes.
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Male and Female Coloring Differences A male has a white throat, while a female has a brown one. The throat coloring on both owls extends along the sides of their heads just behind the face disk in their respective colors. The under wings of the male and the female owls are white.
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Males are more colorful or ornamented than females in most, but not all, bird species. ... Darwin concluded that color differences between sexes in birds (also known as sexual dichromatism) result largely from female preference for bright colors in males.
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The most obvious differences between male and female Bald eagles are their size. Females are usually a third of the size larger than males. Females tend to weigh between ten to fifteen pounds more. Females will typically have a wingspan of up to eight feet.
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Appearance wise there can be very subtle differences between males and females. Generally, the males will have brighter colouration, be slightly larger, more boisterous and sit taller when on the perch. Females eyes tend to sit higher on their head lining up above the beak and males' eyes will be in line with the beak.
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There is a difference between the carapace size of female and male tortoises; females have longer shells than males. ... Irregularities may also occur in which a male is particularly large and a female is small. In this way, both would coincide in a certain size despite the difference in sexes.
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Vent of an adult male crocodile. Compared with the female vent, it is larger and more convex. ... Male and female crocodilians can be hard to tell apart visually. Usually, the best indication is size - males grow larger than females in all crocodilian species, and so a very large individual is more likely to be a male.
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Females will grow larger than males in red-eared sliders and many other turtle species, but the size difference between males and females varies by species. ... Male turtles have a concave (curved in) plastron while females have a flat one.
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The females and males of snapping turtles are about the same size. The difference between sexes shows mainly in the structure of the tail, and for the male snapper the tail is longer, thicker ( 2 ), and the vent is located much further ( 1 ) from the edge of the plastron then that of the female.
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Males are more swollen at the base of the tail than females and have a pair of enlarged scales near their vent (cloaca). Females and juveniles have some color, but not nearly as bright. Even if you can't get a look at the lizard's belly, there are also behavior clues that help reveal gender.
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Size. There is a notable sexual dimorphism between male and female tigers, with the latter being consistently smaller. The size difference between them is proportionally greater in the large tiger subspecies, with males weighing up to 1.7 times more than females.
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Females naturally have wider-set hip bones that allow for the accommodation of eggs, while males are more narrow. While males are generally not as wide as their female counterparts, sometimes their hips widen as they age, so this is not an accurate method in sexing your parrot.
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The most obvious difference between a male and female great blue heron is size. Male herons are visibly larger than their female counterparts, typically weighing between 6 and 8 pounds. A female usually weighs between 4 1/2 and 6 pounds. The male heron's bill is longer than the female's bill.