My recording system is simple. I use an 8GB iPod Touch, BirdTunes app, Aluratek Bluetooth receiver and NMDX compact speakers. The moderately-expensive iPod goes for around $200, but a iPhone (or smart phone with an alternate bird app) will work just the same. The BirdTunes app (not available for android) is the choice for many pros, with outstanding ease-of-use and a cost of $10 (I’ve also used the iBird Explorer Pro, but prefer BirdTunes). For each bird, BirdTunes has selections for regional dialects, as well as various clicks and calls that each species makes. All of them can be useful. A typical recording repeats a song three times with a touch start. BirdTunes also has a rather dangerous, continuous play repeat option that I strongly recommend against using. I find continuous play annoying, and frankly, it’s unethical. It interferes with the actual bird’s song, stresses the bird and blocks your own ears from hearing (and enjoying) the real thing. It’s also unnecessary.The portable speakers I purchased are NMDX Go, about $13. They’re compact, and have a pouch inside for the iPod and a cord to connect a receiver (not built in) or cable. The unit I purchased does not have a volume control, but that’s better controlled from the iPod anyway so it’s not an issue. Volume is ok for most birds, unless you’re trying to draw in, say, a Flicker from a hundred or more yards. This set-up is no match for a male Flicker’s call, or his high-decibel druming on a stovepipe. In general, though, birds hear better than we do, so even if the recording seems meager, the target will hear it and respond if it’s in the neighborhood and is inclined to investigate.
The weak link in my system is the Bluetooth. I’m using an Aluratek receiver from Newegg. It works to a just usable 30 feet. If you exceed that range, you lose the connection and have to re-connect by moving closer. Battery life is another issue. The Aluratek charges via USB, with power lasting for a few hours, enough for a morning and evening in the field. It’s the weak link because my iPod and speaker batteries outlast it. As with most battery powered devices these days, you need to have a power source and the appropriate cables in the field (car), so you can re-charge between sessions.
A hardware problem I encountered was mating the speakers with the receiver, since both had male connectors. The solution was a $2 3.5mm female-female audio connector that I sourced at local electronics store.
For about the same price as my receiver, you could get a pair of 20 ft 3.5mm headphone cables from Radio Shack, and wire directly from speaker to iPod. This would avoid the receiver battery drain issue, and trade the hassle of Bluetooth wireless for the hassle of deploying and retrieving the cable line.
I charge all devices the day before a shoot. My receiver is always plugged into (and inside) the speaker case, including while charging. I put the iPod inside the speaker case after it gets charged, zip up the case, and place it in my camera belt pack where it’s ready for retrieval.In the field, I move through a target bird area looking and listening until I find suitable habitat. I look for a good perch or set one up, mount the speakers nearby, and retreat 20-30 ft to a position that yields a good background, hopefully with the sun “over the shoulder”. The iPod can be hung around one’s neck or attached to the tripod. I play the target song once. If there is no response, I try a few more times. If nothing happens I move on to a new set-up. If you’re knowledgeable about habitat, and timing, it won’t take long to draw in the target bird.
Chances are the bird will first appear in the brush, hidden or partly hidden, searching for an intruder. Finding none, it may hop up on your favored perch and sing, and if you act quickly you’ve got the shot. If the bird seems reluctant to appear, you’re probably too close. Step back a bit and try again, or, move to another site and find a more co-operative bird. Wearing camouflage improves your odds with many species.
Playing recorded bird song is generally prohibited in National Parks or Wildlife Refuges, and many state parks as well. Don’t use recordings along popular trails, with threatened or endangered species, or if your target shows signs of stress. Used ethically, attracting birds with song can be educational, and an efficient way to further your bird photography in the field.