Tanzania · Mara Region
Serengeti NP
460 species and 18,843 records in eBird up to 2024-12-31.
Best months: February–March, with up to 245 species seen regularly.
Seen here in November
Helmeted GuineafowlNumida meleagris
Superb StarlingLamprotornis superbus
Crowned LapwingVanellus coronatus
Common OstrichStruthio camelus
SilverbirdEmpidornis semipartitus
Lilac-breasted RollerCoracias caudatus
Marabou StorkLeptoptilos crumenifer
SecretarybirdSagittarius serpentarius
Egyptian GooseAlopochen aegyptiaca
Black-bellied BustardLissotis melanogaster
White-headed Buffalo WeaverDinemellia dinemelli
Northern White-crowned ShrikeEurocephalus ruppelli
White-backed VultureGyps africanus
Hildebrandt's StarlingLamprotornis hildebrandtiSpecies seen regularly, by month
Species with 3 or more records in that month, all years combined.
Nearby hotspots
- Serengeti NP – Serengeti Serena Safari Lodge9 km458 species
- Serengeti NP – Seronera15 km464 species
- Serengeti NP – Visitor Center15 km392 species
- Serengeti NP – Serengeti Sopa Lodge15 km394 species
- Serengeti NP20 km487 species
- Serengeti NP – Naabi Hill Gate54 km366 species
All 460 species recorded here
- Superb Starling Lamprotornis superbus
- Helmeted Guineafowl Numida meleagris
- Lilac-breasted Roller Coracias caudatus
- White-headed Buffalo Weaver Dinemellia dinemelli
- Marabou Stork Leptoptilos crumenifer
- Northern White-crowned Shrike Eurocephalus ruppelli
- White-backed Vulture Gyps africanus
- Grey-backed Fiscal Lanius excubitoroides
- Fischer's Lovebird Agapornis fischeri
- Crowned Lapwing Vanellus coronatus
- Common Ostrich Struthio camelus
- Hildebrandt's Starling Lamprotornis hildebrandti
- Secretarybird Sagittarius serpentarius
- Bateleur Terathopius ecaudatus
- Egyptian Goose Alopochen aegyptiaca
- Tawny Eagle Aquila rapax
- Ring-necked Dove Streptopelia capicola
- Rüppell's Starling Lamprotornis purpuroptera
- Lappet-faced Vulture Torgos tracheliotos
- Blacksmith Lapwing Vanellus armatus
- Magpie Shrike Urolestes melanoleucus
- Grey-capped Social Weaver Pseudonigrita arnaudi
- Silverbird Empidornis semipartitus
- Black-headed Heron Ardea melanocephala
- Fork-tailed Drongo Dicrurus adsimilis
- D'Arnaud's Barbet Trachyphonus darnaudii
- Rufous-tailed Weaver Histurgops ruficauda
- Kori Bustard Ardeotis kori
- Speckle-fronted Weaver Sporopipes frontalis
- Bare-faced Go-away-bird Crinifer personatus
- Lesser Striped Swallow Cecropis abyssinica
- White-bellied Bustard Eupodotis senegalensis
- Rüppell's Vulture Gyps rueppelli
- White-browed Coucal Centropus superciliosus
- Laughing Dove Spilopelia senegalensis
- Three-banded Plover Thinornis tricollaris
- Rufous-naped Lark Corypha africana
- Little Bee-eater Merops pusillus
- Little Swift Apus affinis
- Red-billed Buffalo Weaver Bubalornis niger
- Grey-breasted Spurfowl Pternistis rufopictus
- Common Bulbul Pycnonotus barbatus
- Fischer's Sparrow-Lark Eremopterix leucopareia
- African Grey Hornbill Lophoceros nasutus
- Red-cheeked Cordon-bleu Uraeginthus bengalus
- Black-winged Kite Elanus caeruleus
- Von der Decken's Hornbill Tockus deckeni
- Wattled Starling Creatophora cinerea
- Yellow-billed Oxpecker Buphagus africanus
- Wire-tailed Swallow Hirundo smithii
- African Pied Wagtail Motacilla aguimp
- Speckled Mousebird Colius striatus
- Purple Grenadier Granatina ianthinogaster
- Meyer's Parrot Poicephalus meyeri
- Red-billed Oxpecker Buphagus erythroryncha
- Vitelline Masked Weaver Ploceus vitellinus
- White-headed Vulture Trigonoceps occipitalis
- Common Hoopoe Upupa epops
- Hooded Vulture Necrosyrtes monachus
- Black Crake Zapornia flavirostra
- Dark Chanting Goshawk Melierax metabates
- Red-throated Rock Martin Ptyonoprogne rufigula
- Coqui Francolin Campocolinus coqui
- Lesser Kestrel Falco naumanni
- Blue-capped Cordon-bleu Uraeginthus cyanocephalus
- White-rumped Swift Apus caffer
- Double-banded Courser Smutsornis africanus
- Slate-colored Boubou Laniarius funebris
- Northern Grey-headed Sparrow Passer griseus
- Black-winged Stilt Himantopus himantopus
- Pygmy Falcon Polihierax semitorquatus
- Pin-tailed Whydah Vidua macroura
- Barn Swallow Hirundo rustica
- Grey Heron Ardea cinerea
- Black-bellied Bustard Lissotis melanogaster
- Hamerkop Scopus umbretta
- Lesser Masked Weaver Ploceus intermedius
- African Paradise Flycatcher Terpsiphone viridis
- Grey Crowned Crane Balearica regulorum
- Ruff Calidris pugnax
- African Grey Flycatcher Bradornis microrhynchus
- Black-chested Snake Eagle Circaetus pectoralis
- Yellow-billed Stork Mycteria ibis
- Chinspot Batis Batis molitor
- Rattling Cisticola Cisticola chiniana
- Martial Eagle Polemaetus bellicosus
- Yellow-throated Sandgrouse Pterocles gutturalis
- Brubru Nilaus afer
- Western Cattle Egret Ardea ibis
- Pallid Harrier Circus macrourus
- Montagu's Harrier Circus pygargus
- Common Sandpiper Actitis hypoleucos
- Little Stint Calidris minuta
- Cape Crow Corvus capensis
- Striped Kingfisher Halcyon chelicuti
- Black-faced Waxbill Brunhilda erythronotos
- Speckled Pigeon Columba guinea
- Wood Sandpiper Tringa glareola
- Capped Wheatear Oenanthe pileata
- European Roller Coracias garrulus
- Mourning Collared Dove Streptopelia decipiens
- Southern Ground Hornbill Bucorvus leadbeateri
- African Fish Eagle Icthyophaga vocifer
- Flappet Lark Amirafra rufocinnamomea
- Long-crested Eagle Lophaetus occipitalis
- Marico Sunbird Cinnyris mariquensis
- Red-fronted Barbet Tricholaema diademata
- Black-lored Babbler Turdoides sharpei
- Northern Wheatear Oenanthe oenanthe
- Woodland Kingfisher Halcyon senegalensis
- White-browed Robin-Chat Cossypha heuglini
- Green Wood Hoopoe Phoeniculus purpureus
- Green-backed Camaroptera Camaroptera brachyura
- Yellow-throated Longclaw Macronyx croceus
- Augur Buzzard Buteo augur
- Red-necked Spurfowl Pternistis afer
- Abyssinian Scimitarbill Rhinopomastus minor
- African Sacred Ibis Threskiornis aethiopicus
- Yellow-fronted Canary Crithagra mozambica
- Red-billed Teal Anas erythrorhyncha
- Greater Kestrel Falco rupicoloides
- Kenya Sparrow Passer rufocinctus
- Zitting Cisticola Cisticola juncidis
- African Pipit Anthus cinnamomeus
- Scarlet-chested Sunbird Chalcomitra senegalensis
- Brown-crowned Tchagra Tchagra australis
- Green-winged Pytilia Pytilia melba
- African Red-rumped Swallow Cecropis melanocrissus
- Red-throated Tit Melaniparus fringillinus
- Abdim's Stork Ciconia abdimii
- White-bellied Canary Crithagra dorsostriata
- Spur-winged Lapwing Vanellus spinosus
- Tanzanian Red-billed Hornbill Tockus ruahae
- Northern Fiscal Lanius humeralis
- Red-faced Crombec Sylvietta whytii
- Yellow-breasted Apalis Apalis flavida
- Nubian Woodpecker Campethera nubica
- Arrow-marked Babbler Turdoides jardineii
- Green Sandpiper Tringa ochropus
- Diederik Cuckoo Chrysococcyx caprius
- Cardinal Woodpecker Dendropicos fuscescens
- Buff-bellied Warbler Phyllolais pulchella
- Chestnut-bellied Sandgrouse Pterocles exustus
- Marsh Sandpiper Tringa stagnatilis
- Striated Heron Butorides striata
- Grey Kestrel Falco ardosiaceus
- Beautiful Sunbird Cinnyris pulchellus
- Spotted Flycatcher Muscicapa striata
- Swahili Sparrow Passer suahelicus
- African Palm Swift Cypsiurus parvus
- Temminck's Courser Cursorius temminckii
- Common Kestrel Falco tinnunculus
- Saddle-billed Stork Ephippiorhynchus senegalensis
- Bearded Woodpecker Chloropicus namaquus
- Verreaux's Eagle-Owl Ketupa lactea
- Red-capped Lark Calandrella cinerea
- Klaas's Cuckoo Chrysococcyx klaas
- Purple Roller Coracias naevius
- Red-eyed Dove Streptopelia semitorquata
- Black-backed Puffback Dryoscopus cubla
- Brown Snake Eagle Circaetus cinereus
- Red-winged Starling Onychognathus morio
- Mosque Swallow Cecropis senegalensis
- Grey-headed Kingfisher Halcyon leucocephala
- Winding Cisticola Cisticola marginatus
- Plain-backed Pipit Anthus leucophrys
- Tawny-flanked Prinia Prinia subflava
- Steel-blue Whydah Vidua hypocherina
- Eastern Grey Woodpecker Dendropicos spodocephalus
- Spotted Thick-knee Burhinus capensis
- Greater Blue-eared Starling Lamprotornis chalybaeus
- Black Kite Milvus migrans
- Hadada Ibis Bostrychia hagedash
- Cinnamon-breasted Bunting Emberiza tahapisi
- Gabar Goshawk Micronisus gabar
- Chestnut Sparrow Passer eminibey
- Brown-throated Martin Riparia paludicola
- African Green Pigeon Treron calvus
- Goliath Heron Ardea goliath
- Blue-naped Mousebird Urocolius macrourus
- Crested Francolin Ortygornis sephaena
- Cape Teal Anas capensis
- Great Spotted Cuckoo Clamator glandarius
- Namaqua Dove Oena capensis
- Yellow-necked Spurfowl Pternistis leucoscepus
- Emerald-spotted Wood Dove Turtur chalcospilos
- Orange-breasted Bushshrike Chlorophoneus sulfureopectus
- Mocking Cliff Chat Thamnolaea cinnamomeiventris
- Banded Martin Neophedina cincta
- Croaking Cisticola Cisticola natalensis
- Eastern Chanting Goshawk Melierax poliopterus
- Greater Flamingo Phoenicopterus roseus
- Village Weaver Ploceus cucullatus
- Black-faced Sandgrouse Pterocles decoratus
- Lesser Flamingo Phoeniconaias minor
- African Cuckoo Cuculus gularis
- Common Greenshank Tringa nebularia
- Pale Flycatcher Agricola pallidus
- Three-banded Courser Rhinoptilus cinctus
- Kittlitz's Plover Anarhynchus pecuarius
- Red-billed Firefinch Lagonosticta senegala
- Tropical Boubou Laniarius major
- Red-backed Shrike Lanius collurio
- Black-necked Weaver Ploceus nigricollis
- Fan-tailed Widowbird Euplectes axillaris
- African Jacana Actophilornis africanus
- Black Cuckooshrike Campephaga flava
- European Bee-eater Merops apiaster
- Red-billed Quelea Quelea quelea
- Pangani Longclaw Macronyx aurantiigula
- Water Thick-knee Burhinus vermiculatus
- Reichenow's Seedeater Crithagra reichenowi
- White-headed Barbet Lybius leucocephalus
- Gull-billed Tern Gelochelidon nilotica
- White-winged Widowbird Euplectes albonotatus
- Rosy-throated Longclaw Macronyx ameliae
- Spot-flanked Barbet Tricholaema lacrymosa
- Long-tailed Fiscal Lanius cabanisi
- Long-tailed Paradise Whydah Vidua paradisaea
- House Sparrow Passer domesticus
- African Spoonbill Platalea alba
- Black-winged Lapwing Vanellus melanopterus
- Pied Kingfisher Ceryle rudis
- Caspian Plover Anarhynchus asiaticus
- Hartlaub's Bustard Lissotis hartlaubii
- African Wattled Lapwing Vanellus senegallus
- Banded Parisoma Curruca boehmi
- Red-headed Weaver Anaplectes rubriceps
- Black Coucal Centropus grillii
- Common Moorhen Gallinula chloropus
- Pearl-spotted Owlet Glaucidium perlatum
- Western Yellow Wagtail Motacilla flava
- Spotted Palm Thrush Cichladusa guttata
- Golden-breasted Bunting Emberiza flaviventris
- Nyanza Swift Apus niansae
- Pectoral-patch Cisticola Cisticola brunnescens
- Jacobin Cuckoo Clamator jacobinus
- White-necked Raven Corvus albicollis
- Chestnut Weaver Ploceus rubiginosus
- Common Ringed Plover Charadrius hiaticula
- Western Marsh Harrier Circus aeruginosus
- Straw-tailed Whydah Vidua fischeri
- African Black Swift Apus barbatus
- African Dusky Flycatcher Muscicapa adusta
- Baglafecht Weaver Ploceus baglafecht
- Common Rock Thrush Monticola saxatilis
- White-tailed Lark Mirafra albicauda
- Speke's Weaver Ploceus spekei
- Southern Red-fronted Tinkerbird Pogoniulus pusillus
- Bronze Mannikin Spermestes cucullata
- Desert Cisticola Cisticola aridulus
- Wahlberg's Eagle Hieraaetus wahlbergi
- Spectacled Weaver Ploceus ocularis
- African Marsh Harrier Circus ranivorus
- Common Snipe Gallinago gallinago
- Pied Crow Corvus albus
- White-headed Saw-wing Psalidoprocne albiceps
- Senegal Lapwing Vanellus lugubris
- Fawn-colored Lark Calendulauda africanoides
- Yellow-spotted Bush Sparrow Gymnoris pyrgita
- Pied Avocet Recurvirostra avosetta
- Violet-backed Starling Cinnyricinclus leucogaster
- Anteater Chat Myrmecocichla aethiops
- Cut-throat Finch Amadina fasciata
- White-bellied Go-away-bird Crinifer leucogaster
- Verreaux's Eagle Aquila verreauxii
- Grey-capped Warbler Eminia lepida
- Lesser Spotted Eagle Clanga pomarina
- Sooty Chat Myrmecocichla nigra
- Common Cuckoo Cuculus canorus
- Yellow-bellied Eremomela Eremomela icteropygialis
- Common Buzzard Buteo buteo
- Collared Pratincole Glareola pratincola
- Black-headed Gonolek Laniarius erythrogaster
- African Scops Owl Otus senegalensis
- Holub's Golden Weaver Ploceus xanthops
- Southern Red Bishop Euplectes orix
- Quailfinch Ortygospiza atricollis
- Little Weaver Ploceus luteolus
- Black-crowned Night Heron Nycticorax nycticorax
- Grey Penduline Tit Anthoscopus caroli
- Red-knobbed Coot Fulica cristata
- Pied Wheatear Oenanthe pleschanka
- Knob-billed Duck Sarkidiornis melanotos
- Great Egret Ardea alba
- Familiar Chat Oenanthe familiaris
- Angola Swallow Hirundo angolensis
- Singing Cisticola Cisticola cantans
- Little Grebe Tachybaptus ruficollis
- Red-and-yellow Barbet Trachyphonus erythrocephalus
- Little Ringed Plover Thinornis dubius
- Little Egret Egretta garzetta
- Common Swift Apus apus
- Square-tailed Nightjar Caprimulgus fossii
- Common Waxbill Estrilda astrild
- Black-crowned Tchagra Tchagra senegalus
- Spotted Redshank Tringa erythropus
- Malachite Kingfisher Corythornis cristatus
- Chestnut-banded Plover Anarhynchus pallidus
- Black-headed Oriole Oriolus larvatus
- Isabelline Wheatear Oenanthe isabellina
- Cardinal Quelea Quelea cardinalis
- Black-and-white Mannikin Spermestes bicolor
- Spur-winged Goose Plectropterus gambensis
- African Openbill Anastomus lamelligerus
- Taita Fiscal Lanius dorsalis
- African Harrier-Hawk Polyboroides typus
- White-crested Helmetshrike Prionops plumatus
- Sand Martin Riparia riparia
- Willow Warbler Phylloscopus trochilus
- Lanner Falcon Falco biarmicus
- Red-necked Falcon Falco chicquera
- African Stonechat Saxicola torquatus
- Whinchat Saxicola rubetra
- Southern Black Flycatcher Melaenornis pammelaina
- Yellow-billed Egret Ardea brachyrhyncha
- African Hawk-Eagle Aquila spilogaster
- Spotted Eagle-Owl Bubo africanus
- Lesser Grey Shrike Lanius minor
- Hildebrandt's Spurfowl Pternistis hildebrandti
- Greater Painted-snipe Rostratula benghalensis
- Eurasian Hobby Falco subbuteo
- Karamoja Apalis Apalis karamojae
- Freckled Nightjar Caprimulgus tristigma
- Grey-crested Helmetshrike Prionops poliolophus
- White-faced Whistling Duck Dendrocygna viduata
- Northern Red-billed Hornbill Tockus erythrorhynchus
- Crimson-rumped Waxbill Estrilda rhodopyga
- Icterine Warbler Hippolais icterina
- Isabelline Shrike Lanius isabellinus
- Western Barn Owl Tyto alba
- Grey-headed Gull Chroicocephalus cirrocephalus
- Yellow Bishop Euplectes capensis
- Village Indigobird Vidua chalybeata
- African Woolly-necked Stork Ciconia microscelis
- African Snipe Gallinago nigripennis
- Lizard Buzzard Kaupifalco monogrammicus
- White-browed Sparrow-Weaver Plocepasser mahali
- Scaly Spurfowl Pternistis squamatus
- Long-billed Pipit Anthus similis
- White-winged Tern Chlidonias leucopterus
- Variable Sunbird Cinnyris venustus
- Squacco Heron Ardeola ralloides
- Slender-tailed Nightjar Caprimulgus clarus
- Eastern Plantain-eater Crinifer zonurus
- Western House Martin Delichon urbicum
- Crowned Eagle Stephanoaetus coronatus
- Grey-headed Bushshrike Malaconotus blanchoti
- Greater Honeyguide Indicator indicator
- White-throated Bee-eater Merops albicollis
- Mottled Swift Tachymarptis aequatorialis
- Black Saw-wing Psalidoprocne pristoptera
- Horus Swift Apus horus
- Short-tailed Lark Spizocorys fremantlii
- Broad-billed Roller Eurystomus glaucurus
- Reed Cormorant Microcarbo africanus
- Rufous Chatterer Argya rubiginosa
- Whiskered Tern Chlidonias hybrida
- Red-faced Cisticola Cisticola erythrops
- Red-chested Sunbird Cinnyris erythrocercus
- Marsh Owl Asio capensis
- Rock Dove Columba livia
- Red-chested Cuckoo Cuculus solitarius
- African Firefinch Lagonosticta rubricata
- Tree Pipit Anthus trivialis
- Eastern Olivaceous Warbler Iduna pallida
- Common Quail Coturnix coturnix
- Harlequin Quail Coturnix delegorguei
- Long-tailed Cisticola Cisticola angusticauda
- Dwarf Bittern Botaurus sturmii
- Amethyst Sunbird Chalcomitra amethystina
- Stout Cisticola Cisticola robustus
- Brimstone Canary Crithagra sulphurata
- Collared Sunbird Hedydipna collaris
- Green-backed Woodpecker Campethera maculosa
- Red-breasted Swallow Cecropis semirufa
- Swamp Flycatcher Muscicapa aquatica
- Southern White-faced Owl Ptilopsis granti
- Garden Warbler Sylvia borin
- African Thrush Turdus pelios
- Black Cuckoo Cuculus clamosus
- Blue-billed Teal Spatula hottentota
- Shikra Tachyspiza badia
- Fan-tailed Grassbird Catriscus brevirostris
- Streaky Seedeater Crithagra striolata
- African Grey Woodpecker Dendropicos goertae
- Black Heron Egretta ardesiaca
- Black Bishop Euplectes gierowii
- Common Buttonquail Turnix sylvaticus
- Long-toed Lapwing Vanellus crassirostris
- White-bellied Tit Melaniparus albiventris
- African Pygmy Kingfisher Ispidina picta
- White-eyed Slaty Flycatcher Melaenornis fischeri
- Common Scimitarbill Rhinopomastus cyanomelas
- Malagasy Pond Heron Ardeola idae
- Bushveld Pipit Anthus caffer
- Palm-nut Vulture Gypohierax angolensis
- Grey-rumped Swallow Pseudhirundo griseopyga
- Golden-backed Weaver Ploceus jacksoni
- Red-headed Quelea Quelea erythrops
- Purple Indigobird Vidua purpurascens
- Northern Yellow White-eye Zosterops senegalensis
- Purple-banded Sunbird Cinnyris bifasciatus
- Malachite Sunbird Nectarinia famosa
- Ovambo Sparrowhawk Accipiter ovampensis
- Purple Heron Ardea purpurea
- Rufous-bellied Heron Ardeola rufiventris
- Booted Eagle Hieraaetus pennatus
- Brown-backed Honeybird Prodotiscus regulus
- Eurasian Golden Oriole Oriolus oriolus
- African Golden Oriole Oriolus auratus
- Amur Falcon Falco amurensis
- Golden-tailed Woodpecker Campethera abingoni
- Northern Black Flycatcher Melaenornis edolioides
- White-fronted Bee-eater Merops bullockoides
- Osprey Pandion haliaetus
- Green-capped Eremomela Eremomela scotops
- Lesser Honeyguide Indicator minor
- African Hobby Falco cuvierii
- Little Sparrowhawk Tachyspiza minulla
- Eurasian Teal Anas crecca
- Sooty Falcon Falco concolor
- Fischer's Starling Lamprotornis fischeri
- Lesser Black-backed Gull Larus fuscus
- Great Cormorant Phalacrocorax carbo
- Northern Brown-throated Weaver Ploceus castanops
- Slender-billed Weaver Ploceus pelzelni
- Black-necked Grebe Podiceps nigricollis
- Alpine Swift Tachymarptis melba
- Somali Short-toed Lark Alaudala somalica
- Fulvous Whistling Duck Dendrocygna bicolor
- Silvery-cheeked Hornbill Bycanistes brevis
- Golden-winged Sunbird Drepanorhynchus reichenowi
- Blue-cheeked Bee-eater Merops persicus
- Bronze Sunbird Nectarinia kilimensis
- Common Whitethroat Curruca communis
- Giant Kingfisher Megaceryle maxima
- African Skimmer Rynchops flavirostris
- Baillon's Crake Zapornia pusilla
- Fawn-breasted Waxbill Estrilda paludicola
- White-backed Duck Thalassornis leuconotus
- Dusky Turtle Dove Streptopelia lugens
- Orange-breasted Waxbill Amandava subflava
- Lesser Moorhen Paragallinula angulata
- Little Rush Warbler Bradypterus baboecala
- Cape Robin-Chat Dessonornis caffer
- Southern Citril Crithagra hyposticta
- Tiny Cisticola Cisticola nana
- Moustached Grass Warbler Melocichla mentalis
- Pennant-winged Nightjar Caprimulgus vexillarius
- Green-backed Honeybird Prodotiscus zambesiae
- Schalow's Turaco Tauraco schalowi
- Little Rock Thrush Monticola rufocinereus
- Eurasian Blackcap Sylvia atricapilla
- Black-headed Gull Chroicocephalus ridibundus
- African Swamphen Porphyrio madagascariensis
- Red-tailed Shrike Lanius phoenicuroides
- Blue-spotted Wood Dove Turtur afer
- Montane Nightjar Caprimulgus poliocephalus
- Western Banded Snake Eagle Circaetus cinerascens
Most recorded first. Species we protect from disturbance aren't listed.
Questions
When is the best time to go birding at Serengeti NP?
February–March. That's when the most species are seen regularly here, up to 245 in a month.
How many bird species have been seen at Serengeti NP?
460 species, from 18,843 eBird records up to 2024-12-31.
What birds can I see at Serengeti NP in November?
The most recorded in November: Helmeted Guineafowl, Superb Starling, Crowned Lapwing, Common Ostrich and Silverbird.
eBird records via GBIF up to 2024-12-31. A record means someone listed it; more records partly mean more birders, not more birds.