Biology, images, analysis, design...
Aphids Find them How to ID AphidBlog
"It has long been an axiom of mine that the little things are infinitely the most important" (Sherlock Holmes)



Hyadaphis passerinii

Honeysuckle aphid

On this page: Identification & Distribution  Other aphids on the same host 

Identification & Distribution:

Hyadaphis passerinii apterae (see first picture below) are elongate and grayish green with a waxy bloom. The antennae and legs are black. The prosternum has a dark trapezoid sclerite, visible in clarified mounts, which is 2.7-3.6 times wider than long (cf. Hyadaphis foeniculi where the prosternal sclerite is 1.36-2.6 times wider than long). The siphunculi are black and slightly swollen, 0.85-1.15 the length of the black, elongate cauda (cf. Hyadaphis foeniculi  wich has the siphunculi 1.05-1.45 times the length of the cauda). The body length of Hyadaphis passerinii apterae is 1.3-2.3 mm.

Hyadaphis passerinii alates (see second picture above) have the abdomen green, mottled with a darker green, and rarely have secondary rhinaria on antennal segment 5.

N.B. The characteristics of some of the populations we have found appear to be intermediate between Hyadaphis passerinii and Hyadaphis foeniculi: Hence we cannot be certain of the identification. Some authorities only accord passerinii and foeniculi subspecific status.

In spring Hyadaphis passerinii colonies curl the leaves of honeysuckles upwards, especially common honeysuckle (Lonicera periclymenum) and perfoliate honeysuckle (Lonicera caprifolium). The honeysuckle aphid host alternates between its winter host (honeysuckles) and its summer host - umbellifers (Apiaceae) especially Daucus, Conium and Pastinaca, where they colonise the stems, leaves and flowers. The return migration is in autumn. Hyadaphis passerinii is found in Europe and the Middle East and parts of Asia. It has also been introduced to southern Africa, Australia and America.


Other aphids on same host:

Blackman & Eastop list 7 species of aphid  as feeding on common honeysuckle (Lonicera periclymenum) worldwide, and provide formal identification keys.

Of those aphid species, Baker (2015)  lists 5 as occurring in Britain: Aphis fabae,  Aphis gossypii,  Hyadaphis passerinii, Macrosiphum euphorbiae  and Rhopalomyzus lonicerae. 


We have made provisional identifications from high resolution photos of living specimens, along with host plant identity. In the great majority of cases, identifications have been confirmed by microscopic examination of preserved specimens. We have used the keys and species accounts of Blackman & Eastop (1994)  and Blackman & Eastop (2006)  supplemented with Blackman (1974) , Stroyan (1977) , Stroyan (1984) , Blackman & Eastop (1984) , Heie (1980-1995) , Dixon & Thieme (2007)  and Blackman (2010) . We fully acknowledge these authors as the source for the (summarized) taxonomic information we have presented. Any errors in identification or information are ours alone, and we would be very grateful for any corrections. For assistance on the terms used for aphid morphology we suggest the figure  provided by Blackman & Eastop (2006).

Useful weblinks