Samba arrived at Marwell Zoo in Winchester from Jimmy’s Farm and Wildlife Park, near Ipswich, before escaping, less then 24-hours later.
It has been missing since Tuesday, March 17, after it got out with another capybara called Tango, who was found shortly after.
It has now been three weeks, with multiple sightings of the large rodent.
Laura Read, the chief executive at the zoo had said that they were helped by the University of Southampton, who used thermal imaging drones.
A spokesperson for Marwell Zoo said: “We are continuing to do everything we can to bring Samba home safely.
“This includes deploying specialist dog units to track her scent using bedding from both Samba and Tango, using thermal drones to identify her amongst the vegetation, and placing camera traps along the waterways where we believe she may be.
Samba the runaway capybara spotted in Twyford, near Winchester. (Image: Claudie Paddick)
“Our teams continue to carry out extensive searches both day and night. However, the area being covered is large, and Samba is particularly adept at avoiding detection, which has resulted in limited confirmed sightings.
“We have received credible reports of Samba in Owslebury, Allbrook, Brambridge and Twyford, primarily along the River Itchen, which provides a suitable natural habitat.”
An expert animal tracker, who has worked with wildlife presenter Ray Mears, was recruited by The Sun to help find the illusive capybara.
Marwell Zoo has been working to find the capybara. (Image: Marwell Zoo)
Speaking to The Sun, animal tracker John Ryder said: “My theory is she has found a quiet area inaccessible to humans, and especially dogs, to lay low.
“Other semi-aquatic mammals would do the same and there are acres of meadow along the river that are quiet and free from pets.
“I would say she is hiding in a reed bed with plenty of access to grass, on a quiet stretch of river.”
Anyone who believes they have seen Samba is urged to contact the zoo on a dedicated 24-hour hotline at 07436 167401.
Callers are asked to send a photo and either a Google Maps pin or What3Words location to assist the search team.