Reading a bird before it flies

Of the four actions Wingbeat models, takeoff carries the largest multiplier — 1.5× the bird’s normal velocity, against 1.0 for level flight and 0.8 for a glide. Only a dive is more demanding.

That’s because takeoff is explosive. A bird going from perched to airborne accelerates harder than at any other point in normal flight, and it usually does it with a burst of unusually deep, unusually fast wingbeats. If you have your camera set for a perched bird, the first three frames of the takeoff sequence will be soft, and those are the frames you wanted.

The good news is that takeoff is the most readable thing a bird does.

The tells

The crouch. Almost every bird compresses slightly before launching — legs bend, body drops a centimetre or two. It’s the same movement you make before a jump, and it happens a beat before the wings do anything.

The droppings. Unglamorous and extremely reliable. Many birds, particularly larger ones and waterbirds, lighten the load immediately before takeoff.

The head swivel. A bird about to fly looks where it is going. A sudden fix on a distant point, held, usually precedes launch. A bird looking around casually is staying put.

Wings unfolding slightly. Feathers loosen at the shoulder — a small adjustment that reads as the bird “getting ready” and is easy to spot once you know to look.

Alarm from a neighbour. In a group, one bird going up takes the rest with it. Watch the edges of the flock, not the bird you want.

What to do with the warning

The point of reading the tells isn’t to react faster — you won’t beat a bird’s reflexes. It’s to have already changed your settings.

The practical routine:

1. Set for the perch. While the bird is static you can shoot slow, keep ISO down, and get the detail shot.
2. When you see a tell, switch to Takeoff. In the app that’s one tap in the Action row. Dial the new speed in immediately.
3. Accept the ISO cost for a minute or two. If the tells were wrong, you’ve lost nothing but a little noise on some perched frames.
4. Prefocus on where the bird will be, not where it is. Birds launch into wind and away from you far more often than towards you.

Which birds give you the most warning

Broadly, mass buys you time. A swan needs a long, deliberate, running takeoff and telegraphs it for several seconds. A heron unfolds slowly enough that you can watch it happen. Geese hold conversations about it first.

Small passerines give you nothing at all. A blue tit is gone before your finger moves — which is why, with small birds, you set for takeoff and simply stay there.

Raptors sit somewhere in between and are worth studying individually. A perched buzzard will often lean forward and open its wings a fraction of a second before dropping off the post, and that lean is your cue.

The reward

Takeoff frames are among the most compelling images in bird photography — full wing extension, feet still trailing, the whole animal in tension. They are also the ones most often lost to a shutter speed set for a bird that was, a moment ago, doing nothing at all.