Bluetit factoid 2

The bluetit (Parus caeruleus) has been classified as sexually monochromatic, which means that male and female are the same colour. This classification is based, though, on human colour perception, not on bluetit colour perception.

Like all birds, bluetits can see ultra-violet light and the front of their heads glow brightly under UV light. Researchers have found that it is the males who choose the females with the brightest heads; this is unusual because it is usually the females who do the choosing.

Females with bright ultra-violet heads are more successful mothers; they rear more chicks to the point of fledging.

All pictures by DKG

More blue tits:

2 thoughts on “Bluetit factoid 2

Add yours

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

Create a website or blog at

Up ↑

%d bloggers like this: