| allaboutbirds.org |
medium |
$190-$470 |
- |
  |
| ebird.org |
medium |
$90-$240 |
- |
 |
| macaulaylibrary.org |
medium |
$140-$360 |
- |
|
| birdsoftheworld.org |
medium |
$140-$340 |
- |
- |
| birdcount.org |
medium |
$120-$310 |
- |
- |
| hbw.com |
medium |
$120-$300 |
- |
- |
| birdcast.info |
medium |
$190-$470 |
- |
- |
| nestwatch.org |
medium |
$140-$350 |
- |
|
| birdsna.org |
medium |
$120-$290 |
- |
- |
| stateofthebirds.org |
medium |
$80-$210 |
- |
- |
| celebrateurbanbirds.org |
medium |
$70-$170 |
- |
|
| noiseproject.org |
high |
$150-$370 |
- |
|
| birdsofparadiseproject.org |
high |
$80-$210 |
- |
|
| elephantlisteningproject.org |
high |
$90-$220 |
- |
- |
| solucionescosteras.org |
high |
$90-$230 |
- |
- |
| ourcoffeeourbirds.org |
medium |
$80-$210 |
- |
- |
| opentrader.com.au |
medium |
$130-$330 |
- |
- |
| openmarkets.group |
medium |
$130-$330 |
- |
- |
| ravensoundsoftware.com |
high |
$90-$230 |
- |
|
| give.birds.cornell.edu |
|
$150-$370 |
- |
- |
| gbbc.birdcount.org |
|
$130-$320 |
- |
- |
| merlin.allaboutbirds.org |
|
$150-$390 |
- |
- |
| dl.allaboutbirds.org |
|
$100-$260 |
- |
- |
| birdsleuth.org |
|
$90-$230 |
- |
|
| naturerx.cornell.edu |
|
$110-$280 |
 |
- |