Side view of a Dark fishing spider (Dolomedes tenebrosus), with a NOW I Wonder watermark in the corner.

April 04 – My Nature Journal

April 04, 2026 Nature Journal

Dark Fishing Spider

Dolomedes tenebrosus

Dark Fishing Spiders are reputed to be common in my area but I’ve never seen one in the wild until today.

Dark fishing spider (Dolomedes tenebrosus) poised on the rim of a manhole cover, with a NOW I Wonder logo in the corner
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The Spot

These spiders are quite large, especially females. Female Dark Fishing Spiders range from 0.6 to 1.0 inches (1.5 to 2.6cm) in body length alone, and their legs can span 3.5 inches (9.0cm) (males are about half the body length of females).

Side view of a Dark fishing spider (Dolomedes tenebrosus), with a NOW I Wonder watermark in the corner.
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I can attest to the size of these spiders; I spotted this one from several yards away.

The Approach

It was perched on the edge of a sewer drain. I approached very slowly because I didn’t want to scare it away. But it turns out I didn’t really need to worry too much. This spider proved to have both excellent vision and an attitude.

The Reaction

The spider reacted to my presence when I was some distance away; maybe about two yards. It darted closer to the holes in the manhole but remained out in the open. For me, this implied remarkable eyesight for a creature that—while big for a spider—is tiny compared to my size.

As I approached closer, I expected the spider to run into cover. Instead, it did the exact opposite. This large, intimidating spider actually darted several inches closer to me. Which got the adrenaline going, let me tell you.

Three quarter view of a Dark Fishing Spider (Dolomedes tenebrosus) perched on the rim of a manhole cover, with a NOW I Wonder watermark in the corner.
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I also found the spider’s willingness to face off with me interesting. I try my best not to anthropomorphize wild animals. Probably this spider just wanted to get a closer look at me before deciding if I was a threat. But the same deep, primal instinct that gives me the automatic heebie-jeebies upon sight of a large spider offered a much different interpretation.

Call me crazy, but I’m convinced that spider was just spoiling for a fight.

Dark fishing spider (Dolomedes tenebrosus) poised on the rim of a manhole cover, with a NOW I WONDER logo in the corner.
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Pumpkinseed Fish

Lepomis gibbosus

Pumpkinseeds belong to the sunfish family Centrarchidae, which one of the most important gamefish families in North America and which includes popular, large fish like the Largemouth Bass.

Underwater scene of two pumpkinseed sunfish (Lepomis gibbosus) among aquatic plants, with a NOW I Wonder watermark in the bottom-right corner.
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These are slow-growing, small fish. Pumpkinseeds grow only an inch or two a year and average size is usually only around 3-5 inches.

Fisherman often catch Pumpkinseeds but don’t hold them in very high regard because of their small size. But Pumpkinseeds can thrill young children who are just learning to fish as they practically volunteer to swallow bait.

Two Pumpkinseed Sunfish underwater with a label reading'Pumpkinseeds (Lepomis gibbosus)' and a NOW I WONDER watermark.
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These two fish were a mated pair.

They swirled and circled together in shallow water inside the bowl of a depression in the lake bottom. This depression was scooped out by the male and represents these Pumpkinseeds’ nest. The female Pumpkinseed will lay her eggs and the male will aggressively guard the nest, the eggs, and eventually the newly hatched young.

Two Pumpkinseed sunfish (Lepomis gibbosus) seen from above in murky water with plant debris
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Pumpkinseeds are pretty easy to recognize. Their most distinctive feature is a bright scarlet spot on each black opercular flap (a structure located on the posterior edge of each fish’s gill covers). Pumpkinseeds also have iridescent blue stripes on their cheeks.

Underwater view of two pumpkinseed sunfish (Lepomis gibbosus) near a rocky bottom; a label at the top reads “Pumpkinseed (Lepomis gibbosus)” and a NOW I Wonder logo appears bottom right.
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In my area, another sunfish species called the Redear Sunfish (Lepomis microlophus) also has red on its opercular flaps but lacks the blue cheek stripes characteristic of the Pumpkinseed.

Skink Lizard

Plestiodon spp.

Skink lizard (Plestiodon sp.) resting on a weathered log among green leaves.
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Breeding male skink (Plestiodon sp.) perched on a rusted surface with a blurred green background; NOW I WONDER logo in the bottom-right corner.
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Breeding male skink (Plestiodon sp.) perched on a rock beside a shallow water habitat.
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Common Whitetail Dragonfly

Plathemis lydia

Male common whitetail dragonfly (Plathemis lydia) perched on a log; caption reads'Common Whitetail Dragonfly (Plathemis lydia) - male'.
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Common Musk Turtle

Sternotherus odoratus

Common Musk Turtle (Sternotherus odoratus) resting on a log in calm water with head submerged; NOW I WONDER logo in top-right corner.
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Common Musk Turtle (Sternotherus odoratus) perched on a log in shallow water, with Now I Wonder logo in the corner.
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Great Blue Heron

Ardea herodias

Great blue heron (Ardea herodias) wading in shallow water with a yellow beak and reflections in the pond.
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Eastern Phoebe

Sayornis phoebe

Eastern Phoebe perched on a branch with a green forest background; label reads'Eastern Phoebe (Sayornis phoebe)' with Now I Wonder watermark.
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Today’s Nature Journal Snapshot

Time of Day

Mid-morning into early afternoon

Setting

Two large lakes

Temperature

Around 77° F / 25° C

Weather

Sunny with scattered clouds

Humidity

Around 56%

April 04, 2025 Nature Journal

Red-bellied Woodpecker

Melanerpes carolinus

Male red-bellied woodpecker (Melanerpes carolinus) perched on a weathered wooden fence with a green garden backdrop
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Today’s Nature Journal Snapshot

Time of Day

Noon-time

Setting

Suburban backyard

Temperature

80° F / 27° C

Weather

Overcast

Humidity

67%

author avatar
Christine
Christine is the creator and author of NowIWonder.com, a website dedicated to the animals and plants that share our world, and the science that helps us understand them. Inspired by lifelong exploration and learning, Christine loves to share her knowledge with others who want to connect with wild faces and wild spaces.