Check out what you might see at Bird Rookery Swamp this week!

Long-time CREW Trust volunteer naturalist Dick Brewer is a treasure-trove of information and brilliant citizen scientist. This week’s critter count includes a chicken turtle, almost 30 red-bellied woodpeckers and a great photo of two crested caracaras. Interested in making your own critter count during your next hike? Print out Dick’s BIRD ROOKERY SWAMP Wildlife Checklist and take it with you!

Bird Rookery Swamp

Wednesday, December 19 ~~ 7:05 AM – 1:00 PM

temperature: 54.0-76.0º ~~ RH 85.5-60.5%

sky: sun early, clouds late ~~ wind: calm at start, then 8-12 mph


Wood Duck – 2

Double-crested Cormorant – 5

Anhinga – 28

Great Blue Heron – 11

Great Egret – 10

Snowy Egret – 3

Little Blue Heron – 7

Tri-colored Heron – 3

Cattle Egret – 1

Green Heron – 4

Black-crowned Night Heron – 11

White Ibis – 22

Roseate Spoonbill – 1

Wood Stork – 2

Black Vulture – 12

Turkey Vulture – 26

Osprey – 1

Red-shouldered Hawk – 14

Crested Caracara – 2

American Kestrel – 1

Common Gallinule – 1

Killdeer – 5

Mourning Dove – 2

Barred Owl – 2

Belted Kingfisher – 8

Red-bellied Woodpecker – 28

Yellow-bellied Sapsucker – 4

Downy Woodpecker – 1

Pileated Woodpecker – 8

Great-crested Flycatcher – 1

Eastern Phoebe –  7

Carolina Wren – 13

House Wren – 1

Blue Jay – 1

Blue-gray Gnatcatcher – 21

Northern Mockingbird – 2

Gray Catbird – 21

Common Yellowthroat – 1

Palm Warbler – 5

Pine Warbler – 1

Northern Cardinal – 4

Common Grackle – 77


White Peacock – 21

Phaon Crescent – 1

Barred Yellow – 16

Tropical Checker – 1


Alligator – 11

Brown Anole – 1

Banded Water Snake – 1

Red-bellied Turtle – 5

Florida Chicken Turtle – 2


River Otter – 2

Raccoon – 1

Wildfile Q & A: Bird Call Vs. Bird Song

A Carolina Wren sings to define and defend its territory.

Q: What are the differences between a bird call and a bird song?

A young Red-bellied Woodpecker calls to its parent for food.
A young Red-bellied Woodpecker calls to its parent for food.

A: A bird call tends to serve a specific function and is primarily
innate rather than learned. A bird song is almost always learned and
is often customized by individual males.


Alarm calls alert every bird within hearing range that danger is
present, and all innately understand what the call means and act
accordingly. The alarm call of one species can be recognized by birds
of many other species.

Location calls let mates or birds in a flock know where the others
are. For example, when a Barred Owl calls during the day, a mate often
answers, sometimes from a good distance away. Each then knows where
the other is. Location calls can also identify good feeding and
nesting habitats.

A chick’s “feed me” call triggers a parental response to find and
bring food to its offspring. As the chicks get older, begging behavior
complements the call for food.

 A Carolina Wren sings to define and defend its territory.

A Carolina Wren sings to define and defend its territory.


Male birds tend to sing more than females, and unmated males sing more
than mated ones. Males use songs to attract mates and to identify and
defend territory. The song warns other males to stay out of its
territory, and it invites females to come in. Males can recognize the
songs of neighbors and usually don’t pay any attention to them, but
they sing furiously if they hear the song of a stranger who might
enter their territory.

In selecting a mate, females may use the size and complexity of the
song to determine a male’s potential fitness as a partner. More mature
males usually have more elaborate songs which may indicate to the
female that the male is a survivor with more breeding experience and
better health.

A majority of songbirds have at least two different songs. The extreme
singer is the male Brown Thrasher which is estimated to have over
3,000 song types.


By Dick Brewer

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