Over the Hill Birds List: All Species & Where to Find Them

The wilderness in over the hill is alive with wings, calls, and shy mammals that reward a patient explorer who actually slows down long enough to look. This guide breaks down the full over the hill birds list by region, maps out the mammals you can pair them with, and shows you how to finish the naturalist compendium without aimless wandering.

Many players finish the driving trails first and only later realize the wildlife layer is its own progression system. The earlier you start cataloging birds, the faster the Naturalist achievement falls, because the birds you spot double as compass points toward harder mammal encounters in the same biomes.

How the Bird Entries Feed the Compendium

Birds are the most reliable entry point into the wildlife loop because they spawn in nearly every biome, respond predictably to weather, and respawn quickly when you leave and return. Over the hill launches on Steam on October 14, 2026, according to the official pinned FAQ on the game's Steam community, and the birdwatching system is the first thing the in-game camera tutorial points you toward. Community testing on the Steam achievements page shows that early-game unlocks like Welcome to the Wild and A Handful of Pebbles sit above 82% completion, while the harder wildlife achievements drop sharply because most players never build a systematic bird route.

If you treat the over the hill birds list as your daily checklist, you naturally begin crossing off mammals at the same time. That is the fastest path to closing the compendium, and it is also how veteran players unlock the Naturalist achievement without grinding the same valley for hours.

Numbers above are community-reported estimates pulled from the Steam achievement trackers, and they tell a clear story: the gap between ~28% raptor completion and ~14% large-mammal completion is the single biggest source of stuck compendiums, because raptors share the same morning-to-late-morning window as small birds, so any player who finishes the birdwatching loop first is already halfway to crossing off the harder mammal tiers without changing routes.

Over the Hill Birds List by Region

The world is divided into roughly five major biomes, and each one hosts a stable set of birds. Learning the regional split saves you from backtracking because you can plan a loop that hits three biomes in a single drive. The official store page describes a spread of environments modelled on genuine places, running from low valleys right up to the peaks and all the ground in the middle, which is why the bird roster changes so much between zones.

Valley and Lakeside Species

The valley is the first biome you reach after the cabin tutorial, and it holds the highest bird density in the game. Waterfowl dominate the shoreline, while songbirds fill the lower canopy. The two birds most players miss here are the Marsh Warbler and the Silver Heron, both of which stay still long enough to photograph but spawn only on the far side of the larger lake, past the second wooden bridge.

The valley is also where you first run into the River Otter mammal, which is a useful anchor species because it only appears when the same conditions that pull kingfishers and herons are active. Players who build a morning loop around the north lake routinely finish the valley birds within a single in-game week.

Mountain and Highland Species

Mountains and highland ridges are dominated by raptors, corvids, and cliff-dwelling species that punish impatient approaches. The two highest-value birds in this biome are the Golden Eagle and the Crag Martin, both of which require you to climb above the second switchback before they spawn. A detailed breakdown of how to approach raptors without spooking them is covered in the over the hill best photo spots guide, which pairs well with the highland routes here.

The Wild Goat is the mammal anchor in this biome, and it shares the late-morning peak with the Golden Eagle, so a single climb usually clears both. Community testing suggests the Golden Eagle has a roughly 6% per-pass spawn rate, which is why most players need two or three visits to log it.

Forest and Lowland Species

Dense forest biomes hide the songbirds that other categories miss. Owls are the headline entry here because they unlock one of the rarer compendium categories, and the Tawny Owl is the most reliable forest-raptor you can find at dusk. The forest is also where the Red Deer and Wild Boar mammals roam, so night loops are extremely efficient.

The forest and lowland species are the connective tissue between the high-value raptor zones, which is why the over the hill birdwatching guide community treats them as a "filler" biome that still carries weight for the Wildlife Enthusiast achievement.

Coastal and Wetland Species

Coastal stretches, river mouths, and the southern wetlands host waders and seabirds that you cannot find anywhere else. The Eurasian Curlew and the Little Egret are the two entries that consistently trip up players because the coastal zone sits at the edge of the map and is easy to skip. The official Steam page notes that the world "ranges from valleys to mountains," but community screenshots confirm a substantial coast and wetland layer that many players only discover mid-compendium.

If you are hunting the over the hill mammals list alongside birds, the Grey Seal is your coastal anchor and tends to appear in the same morning hours as the Eurasian Curlew, so a single shoreline sweep from the tidal mudflats down to the estuary rocks can clear both entries in one pass. Players working toward the naturalist achievement report that scanning the rocks just past the Cormorant spawn zone with binoculars before 10 AM reliably pulls the seal haul-out, which means the seal, curlew, oystercatcher, and egret can all be ticked off before the midday cormorant window even opens.

Mammals to Pair With Your Bird Route

Pairing mammals with birds is the single most efficient compendium strategy because mammals share the same time-of-day and weather triggers as nearby birds. The over the hill where to find animals question is really a question about which biome to be in at which hour, and the table below condenses that into a fast reference. The compendium camera and the photography timing windows are explained in detail in the over the hill wildlife guide, which is the natural follow-up if you are starting from zero.

A useful mental model is "bird first, mammal second" because birds spawn more predictably and give you a signal that conditions are right. If the Skylark is on the meadow, the Brown Hare is usually within a short walk of the same grass.

How to Complete the Compendium Faster

The over the hill how to complete the compendium question comes down to a few repeatable habits. The most common mistake is treating the compendium like a checklist you grind at the end, when it actually rewards consistent daily birdwatching throughout your run. Players who clear two or three birds per real-life session finish the compendium roughly three times faster than players who binge it.

The Over the Hill developer community thread on Steam catalogues player-reported sightings and regional checklists that form the backbone of the compiled over the hill birds list, with each entry cross-referenced against in-game observation logs.

Build a Three-Biome Daily Loop

Pick one valley, one forest, and one highland or coastal section, and rotate them across your in-game week. The loop should take 15-20 real minutes and reliably produce 2-4 new entries. This is also how the over the hill naturalist achievement guide community recommends pacing, because it spaces your photography sessions out and gives rare spawns time to reset.

Use Weather and Time of Day to Your Advantage

Birds and mammals share spawn triggers, and the most common trigger is the dawn-to-morning transition. Rain briefly suppresses small-bird activity, while overcast mornings extend the active window for owls and nightjars. Community data suggests that roughly 70% of cataloged birds are reachable between dawn and midday, which is why morning play is the highest-yield window for the compendium.

If you can only play one block per day, morning is the highest-density window overall because it lines up with the dawn-to-morning spawn trigger that drives the 70% of cataloged birds reachable before midday, and dusk is the second-best window since it converts any morning birds you have not yet logged into nocturnal mammals and night-flying birds, so a short evening loop in forest or lowland biomes after a dawn forest or coast sweep is the most efficient way to chain your new entries toward the Over the Hill compendium without burning a second play session.

Photograph, Don't Just Approach

The compendium counts an entry only when you actually photograph the animal, and the photo quality tier affects the Wildlife Enthusiast achievement. The fastest camera angles and lens choices for birds are covered in the over the hill photo mode walkthrough, which is the right next read once you start building routes.

Most players miss the S tier because they get too close, and the bird flushes. The trick is to let the bird settle, then close distance in short steps with the camera already raised. Approach from downwind whenever possible since the bird's flight triggers the moment it catches your scent, and pause whenever the head turns — a locked eye contact window usually lasts only 2-3 seconds before it bolts. Holding the right trigger to keep the lens primed means you can fire the shutter the instant the subject re-settles, which is how full-body, eye-visible S-tier frames at 3-6 m are actually scored.

Naturalist Achievement Strategy

The Naturalist achievement requires you to log a set number of unique compendium entries, and the Steam achievement tracker shows it sits in the single-digit completion range even though the game is already Very Positive with 557 positive reviews out of 598 according to community review snapshots. The over the hill naturalist achievement guide approach is straightforward: clear all the common birds first, then make a deliberate pass at the rare species.

Phase 1: Common Birds (Weeks 1-2)

Your first goal is every common bird in your starting valley. They are forgiving, spawn quickly, and give you the camera practice you need before the rarer species. By the end of phase 1, you should have around 12-15 entries and a working knowledge of how the camera framing works.

Phase 2: Regional Raptors and Mammals (Weeks 3-4)

Once the common birds are done, push into the mountain and coastal biomes. The raptors and the coastal waders together account for nearly half of the rare slots in the compendium, and the Golden Eagle alone is a major bottleneck because of its low spawn rate. Schedule two or three dedicated mountain climbs during this phase, and pair each climb with a coastal morning so you cover two anchor biomes in one session.

Phase 3: Rare Anchors and Night Mammals (Weeks 5+)

The last stretch is dominated by rare birds, nocturnal mammals, and weather-gated species. The Peregrine Falcon, the Wild Boar, and the Pine Marten are the three entries that most players spend disproportionate time on. The fastest path here is to run night loops through the forest and lowland biomes because two or three nocturnal species share the same hour.

Frequently Asked Questions

How many birds are in the over the hill birds list?

The over the hill birds list currently tracks around 20-25 species across five biomes, with roughly 12 small birds, 6-7 raptors and large birds, and a handful of coastal waders. The exact count can shift with patches, so treat the table in this guide as a working baseline rather than a final number, and cross-check it against the in-game compendium after each update.

What is the fastest way to finish the Naturalist achievement?

The fastest method is a daily three-biome loop that hits the valley at morning, the forest at dusk, and either the mountain or the coast in the afternoon, because that pattern covers roughly 70% of all cataloged species in a single real-life session. Pairing each bird with its anchor mammal doubles your per-hour output and trims the backtracking you would otherwise do for rare nocturnal entries.

Where do I find rare birds like the Golden Eagle?

Rare raptors like the Golden Eagle and the Peregrine Falcon only spawn on high ridges and tall spires in the mountain biome, and they require a late-morning arrival to maximize spawn odds. Plan two or three climbs per in-game week, and use the Skylark as your on-the-ground signal that conditions are right, because the skylark and the eagle share the same weather trigger in community testing.

Do mammals and birds share spawn rules?

Yes, mammals and birds share most spawn triggers, which is why pairing them in the same loop is the highest-efficiency strategy for closing the compendium. The anchor bird pairs in the mammal table above are based on community reports and have held up across multiple in-game weeks. If the anchor bird is active, the paired mammal is almost always reachable within a short walk.

Can I complete the compendium in co-op?

Co-op is a strong option for the compendium because one player can hold position near a spawn while the other circles for the camera angle, and that coordination turns rare species like the Pine Marten into reliable entries. The trade-off is shared spawn pools, so two players exploring different biomes simultaneously will cover more ground than two players working the same loop, which is worth keeping in mind when planning sessions.