Wildlife from one of the colony worlds in my Traveller campaign.
Clockwise from the upper left.

Tree Limpet
Ranging from one to ten centimeters in diameter, Tree Limpets are the most prevalent 'insect' like lifeform on Saknussemm, survivors of an ELE from asteroid impact some fifty million years ago. Tree Limpets display a wide variety of camouflage patterns, thorn shapes, with the occasional bright color pattern among the more toxic varieties. Similar related species have gills and dwell in shallow freshwater streams and pools, occasionally hunting smaller insects just beyond their muddy banks, carrying a small reservoir of water between their shells and back carapace to keep their gills wet..

Steamed in their shells or scooped out and cracked out of their carapace and exoskeleton, they have a taste and consistency similar to terran clams. Apart from livestock slowly being introduced to the planet, Tree Limpets are about the only land animal edible and readily available for the colonists and survey teams to subsist off of.

Triccats
The largest aerial predator, and only warm blooded flier on the planet, Triccats are small cat-like avians from pouncer-chaser stock. They come in a variety of color schemes and patterns, usually mottled browns and grays, to blend into the branches and shadows of the forest canopy. They primary eat Tree Limpets, but occasionally dine on native berries and the hummingbird-like Jerkneedles that swarm out of the subarctic latitude cave systems. Jerkneedles are dangerous in numbers, often feasting on the hunter instead during their nightly swarms, but during the day, blind stragglers make easy prey for a hungry Triccat.

Bokket
A brightly colored fish that dwells in larger Saknussemm bodies of water, but coming occasionally near shores and into estuaries to feed while breeding, roughly once every 168 local days. Despite their bright colors, they aren't poisonous, at least to humans, and as the larger specimens can grow to 200 to 300 kilos, Bokket have become an alternate, readily available source of protein for the colonists. The taste of Bokket flesh ranges from trout to 'tuna' like regions near major muscle groups, but a slightly bitter aftertaste requires experimentation in searing, curing, and seasoning techniques that the locals are still working on.

Stream Eater
A stream and shallows predator apparently at home in either salt or freshwater, Stream Eaters, so far, seem to only get up to about 2 meters in length, and are somewhat rare, at least near the areas being colonized. They can wallow out of streams to chase prey, using their paddles as makeshift legs for a final lunge. Their name comes from their habit to head into very narrow creeks and brooks, often barely deep enough for the 'eater to stay submerged in, and lie in wait for prey to flow practically into their maws - sometimes catching an unwary colonist's leg or ankle if stepped upon.

Though not a serious threat to adult humans, they're big enough predators to be dangerous to young humans or Minsk.

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Notes:

Saknussemm lacks any serious axial tilt and has no moon(s) to affect tides, and very little orbital eccentricity - most life on Saknussemm cycles on a set number of days dependent on the species, and can vary wildly between unrelated species.

The lack of a moon has been speculated to be the reason ELE's have happened periodically throughout Saknussemm's past - there's no gravitational 'shielding' body to collect the rocks zipping past. The current governor of Saknussemm has made tracking of all trans-system bodies a priority for the growing colony, though at present, little in the way of asteroid deflection or mitigation exists in the Directorate arsenal.

Saknussemm orbits at the outer edges of the habitable zone - warm enough to melt equatorial waters, but leaving the potential for massive ice ages and a much narrower girdle of 'temperate' zones around the equator than its sister planet in the same system, Lidenbrock

Lidenbrock is on the inside track of the same habitable zone and has a much more diverse biosphere despite also lacking a 'shielding moon'. Its thought that Lidenbrock itself has collected more of the bigger ELE threatening rocks that would have hit Lidenbrock, thus sheltering its warmer sister world.

Studies of the two biospheres is far from complete, and likely to remain so for centuries, but from initial comparison research it appears life evolved completely independently on each world, and that it arose first on Lidenbrock, roughly 3.5 billion years ago. Saknussemm's own evolutionary history seems to have been rolled back to microbial level several times due to catastrophic impacts, and its current lifeforms are from its most recent iteration of multicellular life, starting between 1.5 and 2 billion years ago.