Sexual dimorphism in birds

[GracesWarbler]

There is a fantastical variety of birds, and some species have notable differences between the males and females.  Post your best photos showing these differences.  Having both birds in the same photo is great, but not required.  I'll start.  Here's a male and a female Red-winged Blackbird:

[Bird Brain]

Great idea for a thread topic!! I'll contribute a couple of photos......

Cinnamon Teal

1-Yolo Bypass NWR 12-05-2013 114 by littlebear_elder, on Flickr

Northern Shovelers

1-Yolo Bypass NWR 12-14-2013 020 by littlebear_elder, on Flickr

[lonestranger]

I had considered a "Bird Sex" thread like this one but thought a title like mine would need a disclaimer explaining that it wasn't about sex. 

 

 

[redcoot]

Here's a comparison between female and male Rose-ringed Parakeets!

 

[Melierax]

Cool idea! Belted Kingfishers - Male vs Female

[Melierax]

Male and female Northern Flickers:

[Melierax]

Barn Swallows: Female, left, male, right

[JimB]

Buffleheads

[GracesWarbler]

Wonderful examples so far.  I like how the male Rose-winged Parakeet looks like it has a a goatee.

Here's a female and male Gambel's Quail:

[mossyhorn]

A pair of House Finches.

Edited December 6, 2018 by mossyhorn
Photo

[The Bird Nuts]

Mallards

Mallard pair by The Bird Nuts, on Flickr

Yellow-bellied Sapsuckers

Yellow-bellied Sapsucker pair by The Bird Nuts, on Flickr

Edited December 6, 2018 by The Bird Nuts

[lonestranger]

Female(left) and male(right) Baltimore Orioles.

Untitled by lonestranger102, on Flickr

 

Female(left) and male(right) Ring-necked Ducks.

Untitled by lonestranger102, on Flickr

 

[lonestranger]

Female(left) and male(right) Pileated Woodpeckers.

IMG_3533 by lonestranger102, on Flickr

 

 

[lonestranger]

While both male and female Trumpeter Swans are similar and not considered sexually dimorphic, sometimes it's pretty easy to tell them apart. 

Untitled by lonestranger102, on Flickr

 

 

[Jim W]

Eastern Bluebirds having a mealworm feast in West Chester, PA yesterday.  Since they are partially hidden in the shot with both birds, I've attached a couple of pictures of singles.

 

 

[lonestranger]

Male(left) and female(right) Common Redpolls.

Untitled by lonestranger102, on Flickr

[lonestranger]

Male and female Evening Grosbeaks with the 2 females in the middle. While I see them almost yearly when I travel up north, I don't think I have seen Evening Grosbeaks at my feeders since I took this photo back in 2012...until today when a single female showed up on our platform feeder for some sunflower seeds. 

Untitled by lonestranger102, on Flickr

[mossyhorn]

Northern  cardinals.

[Cloebird]

Ruddy Turnstone, female in the front. 

[Bird Brain]

Northern Pintails

1-Yolo Bypass NWR 12-20-2013 072 by littlebear_elder, on Flickr

[Bird Brain]

American Kestrels

Female

1-Colusa NWR..Thunder Valley Road. (30) by Wayne J Smith, on Flickr

Male

1-Mendocino trip  9-29-14...9-30 2014 004 by Wayne J Smith, on Flickr

[Melierax]

Female and male Ruddy Duck 

Female Spruce Grouse:

Male Spruce Grouse:

[Charlie Spencer]

On 12/6/2018 at 9:43 AM, lonestranger said:

While both male and female Trumpeter Swans are similar and not considered sexually dimorphic, sometimes it's pretty easy to tell them apart. 

Untitled by lonestranger102, on Flickr

 

 

Easier than getting them apart.

[Myrtle Beach Pete]

Mallards in the pond behind my house in Myrtle Beach, SC.

[mossyhorn]

Female Red-bellied woodpecker.

 

Male Red-bellied woodpecker.