Motmot

Northern Rough-winged Swallow vs Cliff Swallow

Stelgidopteryx serripennis contro Petrochelidon pyrrhonota

Allenati

Fai un quiz con Northern Rough-winged Swallow e Cliff Swallow

Northern Rough-winged Swallow (Stelgidopteryx serripennis) Northern Rough-winged Swallow
Cliff Swallow (Petrochelidon pyrrhonota) Cliff Swallow

Media

Caricamento…

In breve

Il segno distintivo più affidabile per separare il Northern Rough-winged Swallow dal Cliff Swallow è la presenza di una fronte bianca audace e di un posteriore color crema sul Cliff Swallow, che non è mai presente nel Northern Rough-winged. I giovani Cliff Swallow mostrano anche una distintiva maculatura bianca sulla fronte e sulla gola, mentre i giovani Northern Rough-winged Swallow hanno barre alari di colore marrone rossiccio. In volo, il Cliff Swallow ha una coda quadrata e un posteriore pallido in contrasto, mentre il Northern Rough-winged Swallow ha una coda leggermente incisa e parti superiori marroni uniformi. Entrambe le specie sono simili in dimensioni, ma il Cliff Swallow è più probabile che si trovi in grandi colonie rumorose, mentre il Northern Rough-winged Swallow è spesso solitario o in piccoli gruppi.

Consigli di identificazione

  1. White Forehead (Cliff Swallow): Cerca una macchia bianca audace sulla fronte; presente in tutte le età del Cliff Swallow ma mai nel Northern Rough-winged Swallow.
  2. Buffy Rump (Cliff Swallow): Il Cliff Swallow mostra un posteriore pallido e color crema in volo e quando è posato, in contrasto con il dorso e le ali più scuri. Il Northern Rough-winged Swallow ha un dorso e un posteriore marroni uniformi.
  3. Juvenile Facial Markings: I giovani Cliff Swallow hanno una fronte e una gola maculate di bianco, mentre i giovani Northern Rough-winged Swallow non hanno queste e mostrano invece barre alari marrone rossiccio.
  4. Throat Color: Il Cliff Swallow ha una gola scura con guance rosse ricche; il Northern Rough-winged Swallow ha una gola semplice, grigio-marrone scuro.
  5. Tail Shape: Il Cliff Swallow ha una coda quadrata; il Northern Rough-winged Swallow ha una coda leggermente forked o incisa. Questo è più evidente in volo.
  6. Upperparts: Il Northern Rough-winged Swallow è marrone uniformemente sopra; il Cliff Swallow è più scuro con una corona e un mantello iridescenti in buona luce.
  7. Underparts: Entrambi hanno parti inferiori bianche, ma quelle del Cliff Swallow sono più pulite e più nettamente demarcate, mentre quelle del Northern Rough-winged Swallow possono apparire più sporche a causa della lavatura grigia della gola.
  8. Colony Size: Grandi colonie di nidificazione dense (centinaia a migliaia di uccelli) indicano fortemente il Cliff Swallow. Uccelli solitari o raggruppati allentati favoriscono il Northern Rough-winged Swallow.
  9. Nesting Substrate: I nidi del Cliff Swallow sono costruiti in fango e attaccati a superfici verticali; il Northern Rough-winged Swallow utilizza tane in banchi o tubi, solitamente non visibili a meno che non vengano osservati da vicino.
  10. Flight Flocks: I Cliff Swallow volano spesso in stormi stretti e vorticosi vicino alle colonie; i Northern Rough-winged Swallow sono più spesso visti singolarmente o in piccoli gruppi allentati.
  11. Juvenile Upperwing Pattern: Solo i giovani Northern Rough-winged Swallow mostrano barre alari marrone rossiccio; controlla questo alla fine dell'estate.
  12. Sex Differences: Non utile sul campo; i sessi di entrambe le specie sono simili nell'aspetto.
  13. Bill Shape: Entrambi hanno becchi corti e piatti tipici delle rondini; non è un segno utile per la separazione.
  14. Voice: Non descritto nelle note fornite; non fare affidamento sulle vocalizzazioni per la separazione qui.
  15. Pitfalls: Fai attenzione a confondere il giovane Cliff Swallow (con maculature bianche sul viso) con altre rondini a faccia chiara, e a scambiare le parti superiori marroni uniformi del Northern Rough-winged Swallow per un Cliff Swallow opaco in scarsa luce.

Taglia

Entrambe le specie sono molto simili in lunghezza, con il Northern Rough-winged Swallow che misura 13–15 cm e il Cliff Swallow che ha una media di circa 13 cm. La massa corporea del Northern Rough-winged Swallow è di circa 13.9 g [wikidata], e il Cliff Swallow è simile ma non specificato qui. In generale, la dimensione non è un segno affidabile per la separazione sul campo.

Piumaggio

Comportamento

I Cliff Swallow sono altamente sociali, nidificando in grandi colonie dense che possono contare migliaia di esemplari, e sono spesso visti in stormi rumorosi e vorticosi. I Northern Rough-winged Swallow sono più solitari, tipicamente nidificando da soli o in gruppi allentati, a volte vicino alle colonie di Bank Swallow, ma raramente in grandi aggregazioni. In volo, entrambe le specie sono agili, ma i Cliff Swallow possono apparire più frenetici e sono più propensi a essere visti in grandi gruppi.

Habitat

I Cliff Swallow sono strettamente associati a superfici verticali per il nido, come scogliere, ponti e edifici, e si trovano quasi sempre in o vicino a grandi colonie. I Northern Rough-winged Swallow nidificano in tane in banchi, tubi o altre cavità, spesso singolarmente o in piccoli gruppi, e sono meno legati a grandi colonie. Entrambe le specie si nutrono su acque aperte e campi, ma il contesto di una grande colonia di nidificazione favorisce fortemente il Cliff Swallow.

Invia una descrizione migliore

Usa le stesse sezioni del confronto. Il testo viene pubblicato subito.

The most reliable field mark to separate Northern Rough-winged Swallow from Cliff Swallow is the presence of a bold white forehead and buffy rump on Cliff Swallow, which are never shown by Northern Rough-winged. Juvenile Cliff Swallows also show distinctive white speckling on the forehead and throat, while juvenile Northern Rough-winged Swallows have reddish-brown wing-bars. In flight, Cliff Swallow has a square tail and contrasting pale rump, whereas Northern Rough-winged Swallow has a subtly notched tail and plain brown upperparts. Both species are similar in size, but Cliff Swallow is more likely to be found in large, noisy colonies, while Northern Rough-winged Swallow is often solitary or in small groups.

  1. White Forehead (Cliff Swallow): Look for a bold white patch on the forehead; present in all ages of Cliff Swallow but never in Northern Rough-winged Swallow.
  2. Buffy Rump (Cliff Swallow): Cliff Swallow shows a pale, buffy rump in flight and when perched, contrasting with darker back and wings. Northern Rough-winged Swallow has a uniform brown back and rump.
  3. Juvenile Facial Markings: Juvenile Cliff Swallows have white-speckled forehead and throat, while juvenile Northern Rough-winged Swallows lack these and instead show reddish-brown wing-bars.
  4. Throat Color: Cliff Swallow has a dark throat with rich red cheeks; Northern Rough-winged Swallow has a plain, dusky brownish-grey washed throat.
  5. Tail Shape: Cliff Swallow has a square tail; Northern Rough-winged Swallow has a slightly forked or notched tail. This is most apparent in flight.
  6. Upperparts: Northern Rough-winged Swallow is uniformly brown above; Cliff Swallow is darker with iridescent crown and mantle in good light.
  7. Underparts: Both have white underparts, but Cliff Swallow's are cleaner and more sharply demarcated, while Northern Rough-winged Swallow's can appear dingier due to the dusky throat wash.
  8. Colony Size: Large, dense nesting colonies (hundreds to thousands of birds) strongly indicate Cliff Swallow. Solitary or loosely grouped birds favor Northern Rough-winged Swallow.
  9. Nesting Substrate: Cliff Swallow nests are mud-built and attached to vertical surfaces; Northern Rough-winged Swallow uses burrows in banks or pipes, usually not visible unless observed closely.
  10. Flight Flocks: Cliff Swallows often fly in tight, swirling flocks near colonies; Northern Rough-winged Swallows are more often seen singly or in small, loose groups.
  11. Juvenile Upperwing Pattern: Only Northern Rough-winged Swallow juveniles show reddish-brown wing-bars; check for this in late summer.
  12. Sex Differences: Not useful in the field; both species' sexes are similar in appearance.
  13. Bill Shape: Both have short, flat bills typical of swallows; not a useful field mark for separation.
  14. Voice: Not described in the provided notes; do not rely on vocalizations for separation here.
  15. Pitfalls: Beware of confusing juvenile Cliff Swallow (with white facial speckling) for other pale-faced swallows, and of mistaking the plain brown upperparts of Northern Rough-winged Swallow for a dull Cliff Swallow in poor light.

Both species are very similar in length, with Northern Rough-winged Swallow at 13–15 cm and Cliff Swallow averaging about 13 cm. The body mass for Northern Rough-winged Swallow is around 13.9 g [wikidata], and Cliff Swallow is similar but not specified here. Overall, size is not a reliable field mark for separation in the field.

  • Juveniles: Juvenile Cliff Swallows have a distinctive white-speckled forehead and throat, which is highly variable between individuals, and lack the iridescence of adults. Juvenile Northern Rough-winged Swallows are plainer brown above and show reddish-brown wing-bars, a feature not present in Cliff Swallow.
  • Adults: Adult Cliff Swallows have a bold white forehead, dark throat, rich rufous cheeks, and a buffy rump, with dark brown upperparts and wings. Northern Rough-winged Swallows are uniformly brown above with white underparts and a dusky, brownish-grey washed throat, lacking any bold facial or rump markings.
  • Tail: Cliff Swallow has a square tail, while Northern Rough-winged Swallow has a subtly forked or notched tail.
  • Sex differences: Cliff Swallow sexes are identical in plumage; Northern Rough-winged males have longer, broader undertail coverts and hooked barbs on outer primaries, but these are not field marks.

Cliff Swallows are highly social, nesting in large, dense colonies that can number in the thousands, and are often seen in noisy, swirling flocks. Northern Rough-winged Swallows are more solitary, typically nesting alone or in loose groups, sometimes near Bank Swallow colonies, but rarely in large aggregations. In flight, both species are agile, but Cliff Swallows may appear more frenetic and are more likely to be seen in large groups.

Cliff Swallows are closely associated with vertical surfaces for nesting, such as cliffs, bridges, and buildings, and are almost always found in or near large colonies. Northern Rough-winged Swallows nest in burrows in banks, pipes, or other cavities, often singly or in small groups, and are less tied to large colonies. Both species forage over open water and fields, but the context of a large nesting colony strongly favors Cliff Swallow.

Scartare le modifiche?

Hai modifiche non salvate. Se esci ora, andranno perse.

Northern Rough-winged Swallow · Cliff Swallow · I miei uccelli difficili