General Question

LostInParadise's avatar

How do they keep from double counting during a bird count?

Asked by LostInParadise (26637points) 1 month ago

Given the speed and mobility of birds, it would seem to be unavoidable.

Observing members: 0 Composing members: 0

8 Answers

elbanditoroso's avatar

Actually, they count the number of wings. Then they divide by two.

snowberry's avatar

That doesn’t sound practical, unless they use a photograph. And counting wings? Oh my!

rebbel's avatar

If you do a bird count in your garden, or veranda, or what have you, you count for half an hour (or any given length of time ordered by a bird counting authority).
If you see at one point three blue tits in a tree, and 10 minutes later you see five, you only count the five (or the highest number of one species witnessed in that half hour).
If you count migrating birds it is a good idea to make photographs of flocks and count them afterwards (obviously that’s easier than counting them in flight).

When birds are count in those special bird counting events the numbers that come out are rough estimates, I presume, so a certain percentage of double counted species is probably calculated beforehand.

lucillelucillelucille's avatar

I’ve wondered this same thing.
How do they handle this ?

kritiper's avatar

To compensate for this possibility, they probably only consider a percentage of the total count.

Response moderated (Unhelpful)
Response moderated (Spam)
LadyMarissa's avatar

I won’t even attempt to explain how they do it especially when the numbers grow. Read here to learn about the various techniques used. I think the one that fascinated me the most was when a large flock is flying overhead!!! Takes me back to the old saying where there’s a will, there’s a way.

Answer this question

Login

or

Join

to answer.

This question is in the General Section. Responses must be helpful and on-topic.

Your answer will be saved while you login or join.

Have a question? Ask Fluther!

What do you know more about?
or
Knowledge Networking @ Fluther