Unfortunately most photographers realize too late that speedlights just arent built for high shutter speed birding in dense woods. You lose massive amounts of power the moment you click into HSS mode because the flash pulses rather than firing once. Its pretty frustrating when you realize your expensive flash only has like 10 feet of effective range at 1/4000s. If you want real results without blowing your budget, look at the Godox AD200Pro TTL Pocket Flash. It delivers way more juice than an SB-5000 and the recycle time is much more reliable for bursts.

• 200Ws of power helps overcome the HSS power drop.
• Lithium battery lasts way longer than AAs.
• Bare bulb head option gives better coverage. I highly recommend checking the power drop-off charts on sites like Strobist or the technical breakdowns on DPReview before you commit. Speedlights are honestly just not as good as expected for this specific niche... they tend to thermal throttle right when the action gets good.

I used the Nikon SB-5000 AF Speedlight for a bit but unfortunately it didnt live up to the hype for the cost. I had issues with it overheating when I was firing off bursts at some ospreys. To be honest, the Godox V860III-N TTL Li-ion Flash is way better value and the lithium battery recycles much faster than AAs anyway. Save your money.

Regarding what #1 said about "I used the Nikon SB-5000 AF Speedlight for...", honestly, id be real careful with the native Nikon stuff if youre planning on shooting long bursts. i once spent a fortune on the Nikon SB-5000 AF Speedlight thinking it was bulletproof but it just thermal throttles way too fast when youre pushing those high shutter speeds for birding. For your budget, you might want to consider the Godox V1-N Flash for Nikon. its got a lithium battery which is way more reliable than AAs for those fast recycle times you need. one thing though, hss really eats up your power fast. i would suggest picking up a MagMod MagBeam Wildlife Kit too. it basically acts like a magnifying glass for your flash so you dont have to crank the power to 1/1 and fry the unit. just make sure to bring a spare battery... once you start firing at 1/2000s, that charge disappears fast.

Unfortunately, I had a lot of issues trying to make a standard setup work for birding in the PNW. I went out specifically for some shots in the woods near Eugene and the gear just let me down.

• High Speed Sync is technically inefficient. You lose about 70 percent of your effective guide number immediately. This forces the unit to dump more power per shot, which kills your recycle speed.
• The D850 fires at 7 or 9 frames per second, but most speedlights cant sustain that for more than a second before the capacitor voltage drops too low.
• Thermal protection is a huge reliability issue. My unit once hit its limit right as a spotted owl started moving... I just sat there staring at a cooling message while the bird flew off. If you want to actually reach the birds in a dark canopy, you really need to look into a flash extender to concentrate the beam. Without one, you are just wasting power on the foliage. It has been a really frustrating experience for me honestly.