Sand Martin

Riparia riparia

Live from the dock

Active 14 minutes across 3 days since July 2026. Last heard 5 days ago.

In our records

Hear the call

Reference recording · 42 sec

Pascal Christe via Wikimedia Commons, CC BY-SA 4.0

When you'll hear it

Most often heard overnight, after dark. Quiet around midday.

Minutes active by hour, as a table

Minutes active by hour of day
	12 AM	1 AM	2 AM	3 AM	4 AM	5 AM	6 AM	7 AM	8 AM	9 AM	10 AM	11 AM	NOON	1 PM	2 PM	3 PM	4 PM	5 PM	6 PM	7 PM	8 PM	9 PM	10 PM	11 PM
Minutes active	1	0	4	3	6	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Across the year

Present from early-July through July. First heard this year on July 9.

Dock records

First heard: July 9, 2026 (first in our records)
Busiest day: 6 minutes on July 9, 2026
Earliest call: 12:40 a.m.
Days detected: 3 of 69 days monitored

Common questions

What time of day do you hear a Sand Martin at Watts Bar Lake?

Most often heard overnight, after dark. Quiet around midday. These are the hours the dock microphones detect the Sand Martin most often.

What time of year is the Sand Martin at Watts Bar Lake?

Present from early-July through July. First heard this year on July 9. That window is when the Sand Martin has been audible from the Watts Bar Lake dock.

Has the Sand Martin been heard at Watts Bar Lake?

Yes. Active 14 minutes across 3 days since July 2026. Last heard 5 days ago.

How these counts work

5 microphones listen from the dock, day and night. They only count birds from a fixed regional list of 226 species, so a bird that cannot occur here is never added by mistake. Every species has its own confidence bar, and that bar rises when the wind picks up and the audio gets noisy. A bird is not counted until it turns up again across several short listening windows that together cover at least ten minutes. Because the bar sits that high, when this page calls a bird rare, it really is rare.

All of the microphones sit at one spot, our dock, so these counts describe what is audible from that shoreline, not the whole lake. A bird that stays quiet here, or sings out of earshot, can be nearby and still never reach the numbers.

These records are generated automatically from the audio, and no person reviews them one by one. The software is not perfect and sometimes tags the wrong bird, most often on a faint or distant call. Read each as a bird the microphones detected, not a sighting someone checked by hand.

About the bird

The sand martin, also known as the collared sand martin or common sand martin, and in the Americas as the bank swallow, is a migratory passerine bird in the swallow family Hirundinidae.

From Wikipedia, CC BY-SA 4.0 Read more on Wikipedia →