Silkie male or female?

[Taylana]

Hey I'm new to chickens and I have four silkies, two of which I need help sexing.

The white is for sure male, and the black is female. I'm not sure about the buffs though. I'm not allowed to keep roosters, so I want to be sure of the sexes now rather than later.

The first buff I suspect is female and the second male, I am right to assume this? I basing my analysis on their head feathers, combs, and wattles. Any help would be greatly appreciated.

 

[Tricoglossus]

Without knowing the ages it's hard to say. Could you get a clearer side shot of the black one? Front on head shots of all of them would be good too to see the size and width of their combs.

 

[Bleenie]

Roo's usually have "hard" feathers in their combs and they're more spikey looking. Hens will have nice, even and round crests.

The last Buff looks like it has some hard feathers but a picture from straight on would be better to tell.