Citizen science and global biodiversity
Citizen science and global biodiversity

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.

Free course

Citizen science and global biodiversity

2.1 Example 2

Here is another real world example for you to consider.

Example 2 Damselflies – identifying different species

To help us differentiate further, here are videos of male and female demoiselle damselflies:

Download this video clip.Video player: Video 3
Skip transcript: Video 3 A female demoiselle damselfly.

Transcript: Video 3 A female demoiselle damselfly.

[BIRDS CHIRPING]
End transcript: Video 3 A female demoiselle damselfly.
Video 3 A female demoiselle damselfly.
Interactive feature not available in single page view (see it in standard view).
Download this video clip.Video player: Video 4
Video 4 A male demoiselle damselfly.
Interactive feature not available in single page view (see it in standard view).

Are these green and blue insects one species or two? The truth is that they are just one species: the banded demoiselle damselfly (Calopteryx splendens).

To make identification even more confusing, a few species such as the scarce blue-tailed damselfly (Ischnura pumilio) not only have males and females of somewhat different colour, but also the females change colour markedly during their life from the beautiful orange shown in Video 5 to a green-brown colour scheme.

Download this video clip.Video player: Video 5
Video 5 A blue-tailed damselfly (Ischnura pumilio).
Interactive feature not available in single page view (see it in standard view).
CSGB_1

Take your learning further

Making the decision to study can be a big step, which is why you'll want a trusted University. The Open University has 50 years’ experience delivering flexible learning and 170,000 students are studying with us right now. Take a look at all Open University courses.

If you are new to University-level study, we offer two introductory routes to our qualifications. You could either choose to start with an Access module, or a module which allows you to count your previous learning towards an Open University qualification. Read our guide on Where to take your learning next for more information.

Not ready for formal University study? Then browse over 1000 free courses on OpenLearn and sign up to our newsletter to hear about new free courses as they are released.

Every year, thousands of students decide to study with The Open University. With over 120 qualifications, we’ve got the right course for you.

Request an Open University prospectus371